So many truly great guitarists have already been named in this thread.
I'd just like to add one of my favorites (more for his work with Jean-Luc Ponty than with Genesis or Phil Collins):
Daryl Stuermer
And thanks to any of you who have appreciated my sense of humor and up-voted one of my posts.
(I'm now at 2,505 posts on Pinside with 2,506 up-votes.)