Iron Man by Black Sabbath
I believe I’ll second that Black Sabbath.
1970, Janis and Jimi left us, RIP icons.
Definitely Iron Man. Too many to name though.
My choice for today for 70s tunes are
Camarillo Brillo
https://en.wikipedia.org/wiki/Camarillo_Brillo
Carolina Hardcore Ecstasy
https://en.wikipedia.org/wiki/Bongo_Fury
by Frank Zappa