Original: Black Sabbath are an English rock band , formed in Birmingham in 1968 by Ozzy Osbourne ( lead vocals ) , Tony Iommi ( guitar ) , Geezer Butler ( bass ) , and Bill Ward ( drums and percussion ) .
Simplified: The original line up was Ozzy Osbourne ( vocals ) , Tony Iommi ( guitar ) , Terence '' Geezer '' Butler ( bass ) , and Bill Ward ( drums ) History Black Sabbath formed in 1968 .