Jeff Beck is incredible. He's continued to push forward his entire career when his peers have been resting on their laurels for 30 years.
The fusion stuff is my jam but even the industrial electronic shredfest shit is awesome.
I'm not sure anyone else has as much command over the instrument as he does. Sure, other people know more about theory and whatnot, but he can make that bitch bend to whatever he wants out of it and with minimal assistance from gadgets.