IMO......
In order:

1) Jimi Hendrix (what can i say)
2) Joe Satriani (incredible... has a lot of style)
3) Stevie Ray Vaugh (one of my favs... reinvented blues)
4) John pertucci (he does it all... great live)
5) Nuno Bettencourt (Most underrated guitar playas out there he rox)