It would be hard for me to come up with just one.
So many of my favorite guitarists, Like Allan Holdsworth, John McLaughlin, Alex Machacek, Jan Zehrfeld etc. hardly ever play the same solo twice. They are improvisors, based on a deep knowledge of musical language. They do not play set solos in the same song.
I could name dozens of Gong, Bruford, UK, and Holdsworth tracks that are drop dead incredible.
There are a few others that stick out, though that are played more less the same each time.
Steve Hackett -The Lamia
Steve Howe - Awaken
Franco Mussida - L'isola di niente