Which vocalists could you hear and no matter who was backing them, know who they were?
My nominations that I could think of off the top of my head would be....
David Surkamp-Pavlovs Dog
Robert Plant-Led Zep
David Byron-Uriah Heep
Not sure about Jagger. In the beginning, yes, but as they became big there were so many vocalists trying to sound like him, it was hard to tell the original from the copy, particularly some of the American garage bands.