What type of group does Umphrey's McGee and Iron Maiden have in common?
Iron Maiden Iron Maiden are an English heavy metal band formed in Leyton, East London, in 1975 by bassist and primary songwriter Steve Harris. The band's discography has grown to thirty-eight albums, including sixteen studio albums, eleven live albums, four EPs, and seven compilations.
List of Black Sabbath band members Black Sabbath were an English hard rock band from Aston, Birmingham. Formed in 1968, the group originally featured vocalist Ozzy Osbourne, guitarist Tony Iommi, bassist Geezer Butler and drummer Bill Ward. The initial lineup of the band lasted until 1977, during which time they released seven successful studio albums, including UK Albums Chart top-five releases "Paranoid", "Master of Reality" and "Sabbath Bloody Sabbath". Osbourne left the group in 1977 and was replaced briefly by Dave Walker, although the founding frontman returned the following year. His return was short-lived, however, and he was replaced in 1979 by Ronnie James Dio at the suggestion of Sharon Arden, who would later marry Osbourne. Butler also briefly left in 1979, although after hearing sessions recorded by replacement Craig Gruber he returned.