That answer would depend on what musical mood I was in at the time.

Just off the top,

I Want You (She's So Heavy) - The Beatles, always is enjoyable.
Gravity, live version, Mayer


Hard to pick a third.
Time, by Pink Floyd is one I enjoy. So many others too.
"Soi What" by Miles Davis is another all time favorite. (not guitar, but then you did not specify guitar).


Also, I went with my "favorites" at least on a given day, not most technically or otherwise impressive, etc.