In no particular order, just as they came to mind:

Styx
Kansas
Journey
Spyro Gyra
Count Basie
Micheal Martin Murphy
Yellowjackets
Chuck Mangione
Eric Clapton 3X
ZZ Top
Crosby, Stills, Nash & Young 3X
Willie Nelson
Neal Young
Tom Petty
Bob Dylan
Steely Dan
The Dead
Extreme
Los Lonely Boys
Del Castillo
The Scabs
Bob Schneider
Billy Bob Thornton
Willie Nelson's 4th of July Picnic

Also, although I am retiscent to mention it (Hey...the tickets were FREE ): Cher

I'm sure there are others that I do not remember right now.

WhatFurrer

"Meddle not in the affairs of Dragons, for you are crunchy and good with ketchup..."