Some interesting lists in this thread.
I saw a good mix of acts in 60s and 70s - yardbirds, byrds, dead, airplane, janis, hendrix, chicago TA, santana, iron butterfly, pink floyd, paul revere, elp, yes, focus, jeff beck.
Emerson Lake and Palmer! I can’t believe it took 145 posts to see them show up with some of the lists some folks have.
I’m not much of a concert goer, but I did see ELP - great show in a small venue.
RUSH (5x)
YES
Leo Kottke (6??)
Willie Nelson (2x)
Phil Keaggy (3x)
I see that Jon Anderson is still touring! At $800 a ticket and up I think I’ll pass.