Here's what Wiki says the lineup was.
Alabama, Hoyt Axton, The Beach Boys, The Blasters, Bon Jovi, Glen Campbell, Johnny Cash, David Allan Coe, John Conlee, Charlie Daniels Band, John Denver, Bob Dylan, John Fogerty, Foreigner, Vince Gill, Arlo Guthrie, Sammy Hagar, Merle Haggard, Daryl Hall, Emmylou Harris,Don Henley, Waylon Jennings, Billy Joel, Randy Newman, George Jones, Rickie Lee Jones, B. B. King, Carole King, Kris Kristofferson, Huey Lewis, Loretta Lynn, John Mellencamp, Roger Miller, Joni Mitchell, Nitty Gritty Dirt Band, Willie Nelson, Roy Orbison, Tom Petty and the Heartbreakers, Charley Pride, Bonnie Raitt, Lou Reed, Kenny Rogers, Brian Setzer, Sissy Spacek, Tanya Tucker, Eddie Van Halen, Debra Winger, Neil Young, Dave Milsap, Joe Ely, Judy Rodman, X -----------------------------------------------------------------------
In my defense I wasn't there for the entire thing, but I look at this lineup and can only remember a handful - Alabama, Daryl Hall, Rickie Lee Jones, B.B. King, Loretta Lynn, Brian Setzer...
Ironically I even remember someone who is not on the list - Delbert McClinton (remember the song, Givin' It Up For Your Love?)