I'd go with Mike Patton too. I also like Bjork and Jonsi from Sigur Ros.

I see your Tim Buckley and raise you Jeff Buckley.

Yes. Completely. Single most unique singer there is.

I knew this was going to happen, Jeff's voice was too soft and rounded for my taste. Tim can really blow a ****ing house down with his.

Maybe not greatest of all time, but my personal favorites:
http://www.furiacontralamaquina.com/...08/03/greg.jpg
Greg Puciato
http://www.skirtfulloffire.com/blog/...9/07/bjork.jpg
Bjork
http://farm4.static.flickr.com/3296/...802fff5795.jpg
Keith Buckley
http://farm4.static.flickr.com/3150/...4bed8c.jpg?v=0
HR

http://blog.rhapsody.com/Erika%20Wennerstrom.jpg
Erika Wennerstrom.
[IMG]http://api.ning.com/files/uBOcHiv99G1xS1OXI6idEu7XtWS6fhb8LTPvZzGm7ZUwxzL2gl CiQCjAaNK1iJyzUnnuOI*xxb62L1F0ngenHFpz-cRPgyMu/TomWaits.jpg[/IMG]
Waits.

Paul Robeson, an inspiration who stood up to his government for equality and justice and was the greatest voice of the 20th century, a deep bass that could be tender and confidential one minute and rattle foundations the next. He sang songs of struggle and revolution around the world in 20 languages... this guy is just purity to me; he never gave in, but they got to him in the end of course!
YouTube - The Volga Boatmen - sung by Paul Robeson

Freddie Mercury. He has a fantastic voice.

I think Frank Sinatra was the best singer of all time but I really like Freddie.

i really really like Black Francis, but David Bowie and Tom Waits can stir me too. what can i say? if i love the music, i love the singer, range or technical skill not important ... what's most important to me is that the voice matches the music perfectly as an instrument ...

Tom Waits, Otis Redding, Eric Burdon, Steve Marriott, Bob Dylan and Ian Curtis and all terrific in their own way, but I can't really pick a favourite.