What about Rory Gallagher? A great Irish blues player. Don't believe me? - check out 'Live in Europe'. Rory wasn't technically the cleanest player, but he played with such feel and passion. The first proper rock gig I ever went to was Rory at the National Stadium in Dublin (an old boxing venue, only about 1200 capacity). I was 14, - came out with my ears ringing, every cell in my body buzzing.

Rory was a great musician, who played like his life depended on it. And one of the small number of actual nice guys in the biz.

Check him out if you're not familiar with his stuff. (Pretty great on resonator and on mandolin too).

Cheers,
Karl

PS, - a bit obvious maybe, but what about George Harrison?? Not your typical guitar hero, but always played for the song.