That is way too much of a comlicated question. I didnt read all of the replies so forgive me if this is repeated. Every person will tell you a different guitarist. The closest you can come to who's the best is in their time. Youll always have a debate. however, here are some of my favorite guitarists.
Slash
Pete Townsend
Joe Perry
Jimi Hendrix
Dimebag Darrel
Zakk Wylde
Jimmy Page
Angus Young
Jack Black- just cuz he makes evrything funny
I cant go on, my brain hurts now.