Currently, Joe Bonamassa. Have seen him live, just incredible. In addition to the aforementioned, here's my incomplete list.
There's so many to choose from:
1. Rory Gallagher
2. Gary Moore
3. Steve Morse
4. Alvin Lee
5. Jimmy Page
6. Jeff Beck
7. Eric Clapton
And the list goes on and on. Don't forget early legends such as Charlie Christian, Les Paul, and so on.