Id say the best guitarist is defined as someone who can play very technically, and has the ability to play anything thrown their way.
I dont think a great guitarist is someone who can write good guitar songs, all that does is add to their appeal as a musician not a guitarist.
The main reason i dont like Kurt Cobain in these lists is because hes not exactly skilled at guitar, he can play songs, songs that people like.
I agree with nitefly, if he was just a guitarist would we remember him? no, i highly doubt it, hed just be that guitarist from Nirvana who shot himself.
I dont mind you guys not liking buckethead
The only thing is though a lot of people either seem him as the guy from Guns n Roses, or the guy who plays really weird music. However hes more of an experimenter, he plays all different kinds of music, some more technical than others. Some very melodic, some very random and some that sounds like plain old noise.
Thats the reason i believe he's the best, because he tries everything, he dosnt limit himself to one genre. He could play pretty much any song given to him.
Kurt Cobain didnt. He just played some grunge/rock then died and became even more famous.
This thread wasnt to complain that Buckethead wasnt in the top lists. Its not about buckethead at all(i just slipped the comment in the OP as a wee joke). It was to point out that people seem to be mistaking someone influential for someone who can actually play guitar very well.