Bruce Springsteen-The River (1980)

By the late 1970s, Bruce Springsteen had reached the maturity necessary to create a body of work far removed from the youthful dreams of his early albums. However, Springsteen faced a new decade immersed in a creative and personal crisis. The desire to deliver a new album that would meet the expectations of the public and his own record label kept him under constant physical and psychological pressure, and as a result, he discarded a series of tracks intended for an album that was ultimately rejected by the singer himself, who felt they lacked sufficient cohesion and quality for release. Some time later, he returned to the recording studio to tackle his most ambitious project, the one that would simultaneously cement his status as one of the world's leading rock stars. Recorded during the middle months of 1979 at Power Station Studios in New York, Springsteen once again collaborated with his band, The E Street Band, which, curiously, is not credited on the album cover. Released as a double LP, it contains 20 tracks in which the New Jersey musician addresses themes such as coldness, loneliness, melancholy, and attachment to family, but also topics related to youth, as in "Independence Day". Musically, "The River" is a journey through everything Springsteen had done up to that point, with that raw, uncompromising rock fused with hints of country, blues, soul, and folk, all backed by a flawless band, sounding solid and intense, yet vibrant and addictive.

Golden Earring-Eight Miles High (1969)

The fifth album by the Dutch band Golden Earring marked a turning point for their future in terms of quality. It already hinted at the future and characteristic style of progressive hard rock they would develop in the following years. Released in 1969, it was launched by Polydor in Europe and by Atlantic Records in North America. The band that recorded this album consisted of guitarist, singer, and flautist Barry Hay, drummer Sieb Warner, lead guitarist and singer George Kooymans, and bassist and organist Rinus Gerritsen. The album's high point is undoubtedly the monolithic version of the Byrds' "Eight Miles Eight", presented here in a 19-minute whirlwind of hard rock and progressive rock, a truly impressive tour de force showcasing the quartet's power and talent. The rest of the album follows a similar musical path, with tracks like the psychedelic hard rock of "Landing", the pulsating "Song of a Devil's Servant", and the progressive blues rock of "Everyday's Torture". From here on, the group's golden age would begin, creating large-scale media works such as "Seven Tears" (1971), "Together" (1972), "Moontan" (1973) and "Switch" (1975).

Focus-Hamburger Concerto (1974)

This legendary Dutch band revolutionized the world of rock in the early 70s, largely thanks to the unparalleled talent of Jan Akerman and Thijs Van Leer. Akerman is one of the greatest guitarists in history, both electric and acoustic, as well as a master of the medieval lute, while Van Leer is an accomplished keyboardist on the harpsichord, piano, and Hammond organ, and is considered one of the best flautists in contemporary music. Before the release of "Hamburger Concerto", Focus had released several works oriented towards progressive jazz, featuring extensive jams, tracks brimming with blistering instrumentation, and an impressive interplay between the organ, flute, and a remarkable guitar. This fourth release showcases pure progressive rock, as demonstrated by the title track, an expansive piece that occupies the entire second side, where Jan Akerman and Thijs Van Leer share the lead vocals on a track built upon a foundation of classical music. While side A features the Renaissance-inspired "Delitiae Musicae", the enchanting "La Cathedrale de Strasbourg", the powerful "Birth", with one of the most legendary solos in history by Akkerman, and the forceful progressive jazz track "Harem Scarem". "Hamburger Concerto" is the greatest achievement in Focus's career and one of the high points of the progressive rock genre in the 1970s.

Black Sabbath-The Eternal Idol (1987)

While Black Sabbath's career in the 1970s was filled with great works, establishing the Birmingham band as one of the greatest in the history of heavy metal, with a stable lineup of Tony Iommi, Ozzy Osbourne, Bill Ward, and Geezer Butler, the following decade was quite turbulent, marked by numerous lineup changes. First, former Rainbow vocalist Ronnie James took over as lead singer, followed by former Deep Purple member Ian Gillan, and finally, a then-unknown Tony Martin, who ushered in the second most stable period in the band's long history. Further changes were still to come, but with albums like "The Eternal Idol", the band reaffirmed their commitment to high-quality heavy metal, nearly reaching the heights of some of their most iconic works. An album that doesn't lack progressive tendencies, as seen in "Ancient Warrior", "Nightmare", and "The Eternal Idol", while the powerful hard rock/heavy metal, replete with Iommi's incredible and memorable guitar riffs, is present in "Hard Life To Love", "The Shining", "Glory Ride", and "Born To Lose". Although Martin's voice is slightly bluesier and more nuanced than Osbourne's and Dio's, his contribution breathed new life into the career of the iconic British band.

Bodkin-Bodkin (1972)

Bodkin were a short-lived Scottish quintet who released a superb progressive heavy blues album in 1972, but then vanished without a trace. Related to the heavy, dark style of bands like Nosferatu, Atomic Rooster, and Bram Stoker, their sound was based on energetic rock where powerful guitars and a prominent organ created a very appealing mix of dark rock and heavy blues rock, with progressive elements and a certain psychedelia imbued with passages related to the occult and Satanic, but very far removed from the general (literary) concept of bands like Black Sabbath or Black Widow. Their origins date back to 1971 when keyboardist Doug Rome recruited guitarist Mick Riddle and vocalist Zeik Hume, forming the core of Bodkin. Later, bassist Bill Anderson and drummer Dick Sneddon joined them. With this lineup, they entered the studios of producer Jim West, who also owned the independent record label West. He produced and released their self-titled debut album in mid-1972. This single album features five tracks, beginning with the suite "Three Days After Death", which is divided into two parts. The first is highly dynamic, blending heavy rock sounds with subdued passages of atmospheric organ, while the second is more progressive and rhythmic, with sounds reminiscent of Uriah Heep's hard rock. In a similar vein is "Aunt Mary's Traschan", the longest track, which throughout its development leaves us with that scent of classic Deep Purple, while the remaining tracks, "After Your Lumber" and "Plastic Man", being shorter pieces, have less room for progressive moments and are more focused on heavy rock with sharp guitars that remind us of early Black Sabbath.

Michael Sembello-Bossa Nova Hotel (1983)

Although the name Michael Sembello may not ring a bell for many, this multi-instrumentalist, singer, and songwriter is the author of "Maniac", one of the most famous songs of all time. Years earlier, Sembello had worked with Stevie Wonder, participating in the recording of several of his albums, such as "Fulfillingness' First Finale" and "Songs In The Key Of Life", both from the mid-70s. In the following years, he also actively participated in projects for artists like The Temptation, David Sanborn, Donna Summer, and George Benson, among many others. In 1983, Sembello released his first solo album, "Bossa Nova Hotel", which included "Maniac", a song featured on the soundtrack of the film "Flashdance", reaching number one on the Billboard charts and winning an Academy Award for Best Original Song that year. This song, written in collaboration with Dennis Matkosky, definitively launched Michael Sembello's already prolific career. For the recording of "Bossa Nova Hotel", Sembello assembled a stellar lineup of musicians, including bassist Nathan Watts, drummers Vinnie Colaiuta and Carlos Vega, and keyboardists George Duke and Don Freeman. The album's repertoire is a fusion of synth-pop and smooth jazz with bluesy undertones, featuring not only the exhilarating and infectious "Maniac", but also other undeniably high-quality tracks like "Cadillac" and "Automatic Man". From this point on, Sembello dedicated himself almost exclusively to composing film scores for movies such as "Summer Lovers" (1982), "Gremlins" (1984), "Cocoon" (1985), "The Monster Squad" (1987), and "Independence Day" (1996), in addition to sporadically releasing a series of solo albums that remain largely unknown outside of North America.