Kelly Osbourne in brutal spat as rock star claims Ozzy didn't write own songs - and takes on Sharon
(www.birminghammail.co.uk)
Not only well known, but all the albums explicitly credit those guys too lol.
The big controversy was always Bark at the Moon, where Sharon got involved and only Ozzy is credited as a writer. Every other album has credit where credit is due.
Blizzard of Ozz: All songs written by Ozzy Osbourne, Randy Rhoads and Bob Daisley, except where noted Diary of a Madman: All songs by Ozzy Osbourne, Randy Rhoads, Bob Daisley and Lee Kerslake, except where noted
Lemmy is explicitly credited on 4 songs on No More Tears.
It's been known for about 50 years that Geezer was the main lyricist for Black Sabbath. Ozzy just did arrangement and contributed some lyrical changes here and there.
There's not even any controversy here.