1) Guns N' Roses--Knocking on Heavens Door
2) Metallica-- AM I Evil
3) Metallica--Small Hours
4) Van Hallen--You Really Got me
5) Aerosmith--Train Kept A'rollin, Walking in the sand, Come together.
6) Stevie Ray Vaughn--ALl along the Watchtower, Superstition
I would say those are my favorites, at least off the top of my head. Although I could name a bunch of other covers that Guns'N' roses does, basically the Spaghetti Incident.