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.