I can only remember a fraction of what I've seen. Except for the last few, these are all between 67 and 72.
Lovin' Spoonful
Byrds
Jimi Hendrix Experience
Cream
Strawberry Alarm Clock
Janis Joplin
The Rolling Stones
Stevie Wonder
Dr. John the Nighttripper
Ike and Tina Turner
Amboy Dukes
Bob Seger System
Mitch Ryder and the Detroit Wheels
MC5
The Stooges
Commander Cody & His Lost Planet Airmen
Cat Stevens
James Taylor
Ten Years After
Spooky Tooth
Savoy Brown
Mad Dogs and Englishmen
Mountain
Grateful Dead
John Lennon and Plastic Ono Band
Frank Zappa
Laura Nyro
Crosby and Nash
Bob Dylan
Bruce Springsteen
+ about 50 great blues acts (ie Muddy, Wolf, Hooker, etc...)
Spike
please tell me about Janis...I love her so much, if I was alive back then I would have done anything to see her