Wow, for some reason, I thought I'd already replied to this... odd
Warren Haynes, Derek Trucks (has a tone like half-melted butter), SRV, Clapton, Frampton, Joe Walsh, Johnny Winter, Billy Gibbons, etc.
On the lighter side, John Mayer (his blues stuff is awesome, too), Paul Simon, Lindsey Buckingham.
Still looking for a gospel player to light me up. I hear a lot about dubose, but I ahven't found anything that really hits me yet--suggestions on albums?