I'm probably gonna say a few names now no-one knows, but as for metal goes, I go toward more extrema bands and my list will consist of extreme metal guitarists starting with the one which is mine, and apparantly also the public favourite
Adam Darski a.k.a. Nergal from Behemoth, the band won ALL public contests in terrorizer magazine (one of the top metal magazines), amongst other: best guitarist, best band, best live band, best drummer, best bassist, best album, best singer all voted number one by public votes
Karl Sanders and Dallas Toller Wade from Nile, for bringing the fastest and most technical album in the last years, they really are guitar gods
John Gallagher from Dying Fetus, not only his guitar skills are amazing, it's also nice to see he's a down to earth person with very interesting views on life.
Branislav Panic (pronounced panish) from Disdained, a Serbian upcoming band, friend of mine, and guitar skills far beyond his age, he also composes teh songs in the band and is a techniacl genius belonging up there with the best of the brutal
now 90% who read all that will hate the music i just said, but at least i got my voice heard (or my letters read at least :p)