My favourite male vocalists are Chris Cornell, Layne Staley/Jerry Cantrell, Eddie Vedder, Andrew Wood, Robert Plant, Paul Weller, Bob Dylan, Ian Gillan, Ronnie James Dio, Michael Stripe (REM), Bruce ****inson (Maiden), Matthew Bellamy, Dave Grohl, Neil Young, James Hetfield, John Martyn, Jeffrey Lee Pierce, Geddy Lee, Jon Anderson, Tom Petty, Eric Clapton, Anthony Kiedis, Mark Knopfler, Lee Mavers (The La's), John Power, James Skelly, Jarvis ****er, Damon Albarn, Brett Anderson, James Dean Bradfield, Richard Ashcroft, Simon Fowler, Shaun Ryder (lol).
There are also vocalists who are not to my taste but I can still respect them for the obvious talent that they had i.e. Freddy Mercury & others I cant remeraber.
As you can see I suppose my selections get 'progressively worse' as the list goes on but it was just off the top of my head.
If there are any I have missed out then please inform me

ssst:
EDIT: Ian Curtis, Bernard Sumner, Thurston Moore, Joe Strummer..argh theres so many more I have just forgot about.. help!