Ah, my guitar heroes are many and for various reasons.
Graham Coxon/Jonny Greenwood, Ed O'Brien/Tom Morello - Not necessarily for their music (although I like bits and bobs of each) but because they all made a living out of trying to make the guitar sound like ANYTHING except a guitar, and in the former two cases bceause they stapled together often very strange chord progressions and made some wonderful songs out of it.
Larry Hibbit/Paul Townsend - Guitarists from Hundred Reasons, they use alternate tunings and interweaving lines and sometimes slightly weird time signatures and I love them for that. Hibbit especially makes it up as he goes along as far as tunings really, and I love that about him.
Bob Dylan - Could barely play four chords but wrote some of the greatest songs of all time.
George Harrison - Knew what to do that was exactly right for the song. Two of my favourite guitar moments ever are the opening squall of noise from 'It's All Too Much' and that little, tiny lick at the end of 'Got To Get You Into My Life' that is more or less the only bit of guitar in the song, but is just all the song needs. He has such clarity in his tone as well.
David Gilmour - Proved that taste and feeling means more than speed.
Rivers Cuomo - Did quasi-metal solos in these wonderfully geeky, off-kilter pop songs. Perfect.
Mick Harvey - Does a great job of making stabs of guitar noise, acoustic playing, or the intuitive slide of 'Far From Me.' Great stuff.
Bernard Sumner - Didn't know what the hell he was doing, but made sheets of awesome noise.
Peter Hook - A bassist, but a bassist is a bass guitarist so he counts. Played bass like lead guitar, and I love that. A standard bearer for the 'no root notes!' society.
Plus a lot of these guys are multi-instrumentalists like myself, which is equally inspiring to me, because it means that I just make any instrument sound like I want it to sound rather than how it should sound.