I would submit, as an addition to the list, Brian Connolly of The Sweet. He had a voice like no other that I’ve ever heard before or since. Liked two songs in particular — (1) Set Me Free (from their Desolation Boulevard release) and (2) Action (from their Give Us a Wink release).
Not sure if it was Creem, Crawdaddy, or another rock magazine — but there was a poll of Best Voice, and Connolly beat out Ian Gillan of Deep Purple. His life tragically ended way too soon, due to chronic alcoholism.
Who, everyone on the list? :)
bkMk