Ho yeah, totally forgot mine... d'oh:
1) Jimi Hendrix - Totally revolutionized music itself. No other person has impacted guitar playing like he has. Also innovated the use of multiple effects pedals for his star spangled performances.
2) Les Paul - Not only an awesome jazz guitar player with all that bright sparkely jazzy tone, but also had massively contributed to music technology. Designed one of the greatest axes of all time. Slash, Steve Millar, Brian May and Keith Richards don't salute him for nothing...
3) Stevie Ray Vaughan - To me, he's the most soulful player ever. Texas blues never sounded better. Totally love his tone and 'looseness' when playing. Although he's a fan of Hendrix, I think he really did covers that are comparable (or sometimes better) than the original ones by Hendrix himself.