How many managers did black sabbath have?

Answer 1

22 members throughout their career so far:

1 lead guitarist

Tony Iommi who also plays piano, Flute, synthesizer, organ, mellotron

6 singers

Ozzy Osbourne (beginning about 1979)

Ronnie James Dio (on and off from 1980 to 2010) RIP

Ian Gillan (1982-1984)

Ray Gillen (1986-1987) RIP

Glenn Hughes (!985-1986)

Tony Martin (1987-1991, 1993-1997)

6 bass players

Terrance "Geezer" Butler (1969-1980, 1982-1985, 1997-present)

Dave Spitz (1985-1986, 1987)

Bob Daisley (1986)

Jo Burt (1987)

Laurence Cottle (1988-1989)

Neil Murray (1989-1991, 1994-1995)

8 Drummers

Bill Ward (1969-1980, 1982-1985, 1997-present)

Vinny Appice (1980-1982, 1991-1992, 1998, 2006)

Bev Bevan (1983-1984, 1987)

Eric Singer (1985-1987)

Terry Chimes (1987)

Cozy Powell (1988-1991, 1994-1995)

Bobby Rondinelli (1993-1994, 1995)

Mike Bordin (1997)

1 keyboard player

Geoff Nicholls (1980-2007)

Answer 2

If you are referring to the UK Singles Chart, then the answer is none. In the corresponding UK Albums Chart, their 1970 album ''Paranoid'' is their only, to date, chart topper. However, I do not have access to American chart statistics.