Anthony Frank Iommi is an English guitarist, songwriter, and producer. He was lead guitarist, co-founder and leader of heavy metal band Black Sabbath, and was the band's primary composer and sole continuous member for nearly five decades. Iommi was ranked number 25 in Rolling Stone magazine's list of the '100 Greatest Guitarists of All Time'.
Terence Michael Joseph 'Geezer' Butler is a British musician and songwriter. He is best known as the bassist and primary lyricist of the heavy metal band Black Sabbath. He has also recorded and performed with Heaven & Hell, GZR, and Ozzy Osbourne. Butler is currently the bassist of Deadland Ritual.
Glenn Hughes is an English bassist and singer, best known for playing bass and performing vocals in funk rock band Trapeze and in the Mk. III and IV line-ups of Deep Purple, as well as briefly fronting Black Sabbath in the mid-1980s. He is known by fans as 'The Voice of Rock' due to his soulful and wide-ranging singing voice.