This is probably the most difficult choice Ive seen in this contest. We all know Yngwie is about blindingly fast perfectionist in both technique and plain talent. Gilmour's guitar work with the Floyd brought light to emotional darkness per say. Gilmour has much more depth than Ynwgie and can probably inspire a rock to roll over by itself.

But then again, what is this? Musician wars? oh wait this is a GUITAR war.
Yngwie could Axe Gilmour into bits :D

YNGWIE