I saw Black Sabbath in a small arena in 1972. I was amazed at their and Bill Ward's minimalist setup and the power they generate. It must have been the "dark forces" at work.
From memory the drum set was a 22 BD and a basic 4 pc. kit. He sat very low with big cyms. Compared to other bands of the time, they looked like your local frat band setup. Close to each other in the middle of a bare stage. They all just kinda rocked back and forth with none of the stage dramatics one might expect. Bill kept his head down the whole set.
A week or so late ELP played the same arena and their setup was huge. I had never seen any band with a big drum setup like Carl Palmer. 2 gongs if I remember........yeah 2.
Dose Days!