I've got too many to name. But the show must go on. These guys don't necessarily have to sing in tune all the time but for me, the vocalist must convey the song's emotion and lead the song, and these vocalists I find are awesome.
M. Shadows, Avenged Sevenfold
David Draiman, Disturbed
Sully Erna, Godsmack
James Labrie, Dream Theater
Jon Bon Jovi, Bon Jovi
Bono, U2
Myles Kennedy, Alter Bridge
Gary Lightbody, Snow Patrol
Bruce Fitzugh, Living Sacrifice
And from our local scene:
Dewi, Marchtwelve
David Tan, Electrico