These were memorable concerts for me. No particular order.
Crosby, Stills, and Nash at UIUC in the early 80s. Somehow, we landed great seats. Watching Stephen Stills on guitar, up close, singing Suite: Judy Blue Eyes? Wow.
Rick Danko & Levon Helm played at a small LAC, in a small venue, early 80s, and we went, just for something to do that weekend. I had no idea who they were. BLEW ME AWAY.
Big Twist and The Mellow Fellows, also at a small LAC in a small venue, early 80s. So much fun, and so much energy.
The Music of Led Zeppelin, where a major symphony accompanies an excellent cover band. Great fun for the audience and symphony members alike.