The Clash
The Damned
Wu Tang Clan about ten years ago, in America so they could have all attended.
Bob Marley & The Wailers (a mate of mine was at the gig which was recorded for the 'Live In London' album, lucky (old) fucker).
V.U. (before I was born)
Bowie (before I was born)
Little Richard in the early days (long before I was born)
Jerry Lee Lewis in the early days
Elvis in his prime
many, many more.
Actually, since the other live music thread went up, Queen in their heyday.