I can think of at least two others that are better: Lindsay Buckingham in "I'm So Afraid" on the album "The Dance" and Jethro Tull's guitar slinger (Martin Barre?) on the song "Aqualung."
Whoa!! I made my post then went back to read the full contents of the thread! Good call!
I would also mention Steve Howe, esp. some of the stuff on Tales From Topographic Oceans.
Even though Tales has some fluff and SEEMS disjointed, it has IMHO Yes's best composition. If they had trimmed it down to 3 sides worth, it could have been spectacular.