I'm not particularly interested in whose 'best', but my five favourite guitarists are probably 1 Robert Johnston 2 T Bone Walker 3 Buddy Guy 4 John Martyn 5 Nick Drake But I guess Muddy Waters, Son House, Blind Blake, Lightnin' Hopkins, Elmore James, BB King, Albert King, Freddie King, Hubert Sumlin, Blind Lemon Jefferson, Blind Willie MacTell, Rev Gary Davis, Albert Collins, Clapton, Robert Cray, Peter Green and Kelly Joe Phelps are up there for me too!!