Who sang for black sabbath?

Ozzy Osbourne: Ozzy Osbourne was the iconic lead vocalist of Black Sabbath from its inception in 1968 until his dismissal in 1979 and briefly from 1997 to 2006 as well as various reunion shows and tours over the years. His distinct vocal style, combined with his energetic stage presence, helped shape the heavy metal genre. Known for his "Prince of Darkness" persona, Osbourne went on to have a successful solo career after leaving Sabbath.

Ronnie James Dio: Ronnie James Dio joined Black Sabbath in 1979, replacing Ozzy Osbourne. Dio's powerful and versatile voice brought a different dimension to the band's sound, and his tenure with Sabbath produced several classic albums, including "Heaven and Hell" and "Mob Rules." Dio left the band in 1982 but returned briefly in the 1990s and again for the final Black Sabbath reunion tour in 2011-2012.

Ian Gillan: Ian Gillan briefly replaced Ronnie James Dio as the lead vocalist of Black Sabbath in 1983. Gillan, known for his work with Deep Purple, brought his unique vocal style to the band's album "Born Again." However, his tenure with Black Sabbath was short-lived, and he left the band the same year.

Tony Martin: Tony Martin joined Black Sabbath in 1987, replacing Ian Gillan. Martin's powerful and melodic vocals helped the band release several solid albums, including "Headless Cross" and "Tyr." He remained with Black Sabbath until their initial disbandment in 1995.

Glenn Hughes: Glenn Hughes, known for his work with Deep Purple and Trapeze, briefly collaborated with Black Sabbath in the early 1980s, providing backing vocals on the album "Never Say Die!"

Additionally, Black Sabbath also featured other guest vocalists on some of their tracks, such as Geezer Butler on "Fairies Wear Boots" and Bill Ward on "It's Alright."