Slash yes, when I took up guitar he was my 'in' for learning feeling rather than total power or technique, the blues influence to a kid who loved hair metal and saw even the likes of Blackmore and Fleetwood Mac as old farts, at the time anyway. The songs got a lot of flak at the time, but the tones on Guns n Roses' Estranged and November Rain are a real lesson. The way he bends notes up rather than going straight to the note he wants is beautiful. The interplay on some of the 'Appetite' tracks between him and Izzy, much as with Joe Perry and Brad Whitford in Aerosmith, you can mistake it for over thought, well polished and mixed studio work until you see it live and see it's real, in sync jamming.
Kirk Hammett, very talented, possibly favours certain scales too much but then again it suits the band perfectly mostly. I've always thought if you can listen to a track and know instantly the guitarist, then they've achieved something big, and with creeping death, until it sleeps and more, you know exactly who is playing.
My number one I'm sure won't be well known, I don't want to influence the vote now but may post a video after the results are up if I remember. But it's all about how a guitarist made you feel and how his music spoke to you, so no really wrong answers. They guy I voted top inspired me to get better, get faster, get precise, taught me it's ok to learn from others if you take it and use it, but it has to mean something, sound pleasing, have thought, not just a fret wank for the sake of it.
There are loads of more technical and better guitarists than the ones I put on my list, but none of them inspired me personally to pick up the axe or influenced my playstyle, so there you go, all about personal experience and preference.