I know I'm gonna forget a few and I'm going to show my age, but here we go: Black Oak Arkansas, Lynard Skynard (original) Ted Nugent 3x, Nazarath, Aerosmith 4x, Yes 3x, Led Zeppelin 2x, Leon Russell, New Riders of the Purple Sage, Sea Level, John McLaughlin 3x, Steve Morse, Johnny Winter, The Who (pre and post Kieth Moon), ELP 2x, Johnny Winter 3x, Edgar Winter, Van Halen, The Pretenders, Hall and Oates, Joe Pass, Black Sabbath w/ Ozzy, Bobby Whitlock (Derek and the Dominoes), Eric Clapton, Jimmie Vaughn, John Cippoline (Big Brother and the Holding company), Leslie West, Herb Ellis, Muddy Waters, Steve Vai, Eric Sardinas, Linkin Park, Snoop Dog, Korn, Kieth Jarret, Bobby Blue Bland, Atlanta Rythym Section, REO Speedwagon (countless times as an opening act), Rush, Stanley Clark, Bachman Turner Overdrive, Queen, Little Feat, The Clash, Rod Stewart, Blue Oyster Cult (to this day perhaps the best show I ever saw!), Eurythmics (first US concert tour, Annie Lennox was smokin..!), UB40, Michael Jackson (back when he was still black and talented!), Bonnie Raitt, (she was young and smokin... as well!), Steppenwolf, George Thorogood, Brian Setzer, Robin Trower, Mick Jones from Foreigner, Ron Wood, oh yes Foghat too, Return to forever, Lenny White, Culture Club, Bruce Springsteen.
I'll update as I remember.