I don't know who the "best" is or was.. But I appreciate Joe Satch, Steve Vai, Jason Becker, John petrucci, to name a few.. Joe Satriani being my favorite guitarist of all time, I seen him live a couple times, talked with him and played one of his guitars...
I don't know if anyone is better than me though, {no sa I am terrible} but I can play piano like Elton John {no sa I am terrible at that too}, I own so many guitars if I just played each one for 20 minutes a year, it would be epic, but instead I listen to music rather than play it anymore... My oldest son is into it a little but doesn't apply himself, he picks a song plays it for a while {until I want to strangle him so he forgets how to play, how many times can you hear the acoustic sweet home alabama {with the c-add-9 chord way to strong}}...