I see Eric Johnson lists his Top 10 Guitar Tones of all time on the MR homepage. Pah, what does he know, I saw him live recently and his tone wasn't all that!
So what's yours? (lets keep it to 5 to make it harder to choose and easier to read).
I'll start: in no particular order and with little thinking time...
Neil Young - Cortez the Killer (live Weld version)
Eric Johnson - Cliffs of Dover (I'll give him that, spent a good protion of my yoof trying to relicate)
Jimi Hendrix - Bold as Love (that fuzz tone at the end, yummy)
Larry Carlton - Kid Charlemange
EVH - Beat It
Thinks that covers it, although just to cheat and on a more general basis: anything by Peter Green or Jeff Beck, them boyz haz da toan IMO.