Favorite band or artist of all time?

"There can be only one"

crap. well, OK.

based on the idea I'd be listening to just this group forever without  any other musicians I'd opt for The Beatles.

Huge catalog. varied presentations and styles.  definitely an easy listen.

A good argument could be made for the 'Stones' & Sir Elton on that note as well.

Gustav Mahler.  David Bowie. 

Ihasaguy -- Sorry to report but I walked out of the Allman Bros Band/Duane Allman concert they put on in Santa Barbara in '71, during the same tour you certainly saw.  It got to the point where I decided that if I hear Duane do that whoop-dee-doodle-do guitar lick one more time, I'd leave.  About ten seconds later, he did it again.

johnto. The Beatles definitely changed the landscape of Rock&Roll! Probably wouldn't have been the same without them. GENIUS 😎
Talk about Influenciaal!!!

So many great artists. Hard to pin down even the top ten, I do think that Chuck Berry deserves to be very high on the list. Mostly overlooked, for some unknown reason.

Impossible question, but it has to be Joni Mitchell. She got me through my teenage angst, just, with "Blue", my all time favourite LP and I'm 71 now. That's an awful lot of years.