Black Sabbath

Black Sabbath were an English rock band formed in Birmingham in 1968 by vocalist Ozzy Osbourne, guitarist Tony Iommi, bassist Geezer Butler and drummer Bill Ward. They are often cited as pioneers of heavy metal music.[1] The band helped define the genre with their first three albums Black Sabbath (1970), Paranoid (1970) and Master of Reality (1971). Following Osbourne's departure in 1979, the band underwent multiple line-up changes, with Iommi being the only constant member throughout their history. -Wikipedia