Who believes that Robert Plant

He didn't R&R often, but for when he did George Gobel would be my top pick.

Kjweisner mentions Freddy Mercury, did the OP forget him, how can you? I love Plant and he is right up there among the most unique, at least in his heyday, but so far as Freddie is concerned, my guess is the OP forgot him or maybe Queen isn't to his taste? And by the way the question is presented, the question SEEMS to me about the most POWERFUL and original voice with great range, not just great voices, there are many. What are your thoughts Czarivey?

Are we talking about screamers? If not I think Muddy Waters has a pretty rockin voice. I can't say who is the best. A lot that has been mentioned are great. I am glad we have them all.

1 vote for Chris Cornell.

If they don't have to be too intellectual my vote goes to Scott Bon of AC/DC.