I don't like the band but of course I've heard of them!
I don't like scorpions...
Sabbath, Metallica and Megadeth are all better Metal band, well the old Metallica stuff anyways, and Ozzy remains the greatest metal artist
Ozzy was a pioneer, but I really wouldn't say he remains the best.
The only Sabbath stuff I can stand is the Dio era, with Neon Knights and all that... and by extension his solo stuff... I'm not particularly in love with the Scorpions but they've done a few cool songs, and I'm doing the whole hair metal thing right now. Dokken, Scorpions, Dio, Motley Crue, Def Leppard... Iron Maiden a bit...
Earlier Metallica is alright, but today they're pretty appaling... I'll have to look into Megadeth, but from what I've heard they're not really my kind of music.