Vai, satriani, batio, malmsteen, eric johnson, slash, eric clapton, jimi hendrix,kirk hammet, eddie van halen, Mark knopfler. They are all pretty damn good.

If you check youtube there is some really good guitar players that arent famous, guys like Jerry C, Mattrach(youtube name), funtwo. All three have one thing in common, they both played canon rock, which is basically pachabels canon in D turned into a total shred rockathon and sounds awesome. I can play some of it. Jerry C wrote it and he sure can play.Mattrach did a cover of canon rock, played it heaps good...then wrote his own and it sounded even better. The guy is around my age and kicks my arse totally on the guitar...but hes played since he was 7 it says on his bio thing. Have a look on youtube, you find heaps good undiscovered guitarists.