I can't help but believe that Nirvana wouldn't still be getting airtime if not for Kurt's death. And thus resulting in him being in this poll even tho there are soooo many much more talented band vocalists. If you read his autobiography, which illustrates many of his letters before this death, he pretty much knew that his death would mean that Nirvana could live on. Just my two cents.
Well even though none of these people are my favorite lead singers I do have to say that Eddie Vedder has a good voice.
I voted for Nirvana just because Cobain's the youngest of them all (Eddie Vedder is older/younger?). There's no real winner here though, they're all awesome. You should have represented at least 1 female vocalist, like Ann Wilson of Heart (okay so I just ran into Heart again recently on Youtube yesterday but Crazy On You/Barracuda make a great case for her vocals).
Bon Jovi is the best....well back in 80's and mid 90's. Watch some of his live concerts of the "always" song on youtube, such a great voice.