A couple I haven't seen mentioned yet:
James Taylor
Dan Folgelberg
Jon Bon Jovi
Eddie Vedder (Pearl Jam)
Chris Cornell (Soundgarden)
James Hetfield (Metallica)
Ozzy Osbourne
Mick Jagger (Rolling Stones)
Steven Tyler (Aerosmith)
Robert Plant (Led Zepplin)
Freddy Mercury (Queen)
George Thorogood
Stevie Ray Vaughn
Eric Burdon (The Animals)
Jim Morrison (The Doors)
Neil Young
Stephen Stills
David Crosby
Art Garfunkel
Paul Simon
Steve Perry (Journey)
Ronnie Van Zandt (Lynard Skynard)
Ronnie James Dio (Rainbow, Black Sabbath)
Roger Daltrey (The Who)
Paul Rodgers (Free, Bad Company)
Bono (U2)
Bob Seger
Bruce Springsteen
Phil Collins
Greg Allman
Peter Gabriel
Sting
David Lee Roth
David Gilmour (Pink Floyd)
Ray Davies (The Kinks)
Bon Scott (AC/DC)
Cat Stevens
Brian Johnson (AC/DC)
Bryan Adams
Steve Miller
Roger Waters (Pink Floyd)
Michael McDonald (The Doobie Brothers)
Tom Petty
Peter Wolf (J Geils Band)
Lou Reed
Levon Helm (The Band)
That's about it for now....
James Taylor
Dan Folgelberg
Jon Bon Jovi
Eddie Vedder (Pearl Jam)
Chris Cornell (Soundgarden)
James Hetfield (Metallica)
Ozzy Osbourne
Mick Jagger (Rolling Stones)
Steven Tyler (Aerosmith)
Robert Plant (Led Zepplin)
Freddy Mercury (Queen)
George Thorogood
Stevie Ray Vaughn
Eric Burdon (The Animals)
Jim Morrison (The Doors)
Neil Young
Stephen Stills
David Crosby
Art Garfunkel
Paul Simon
Steve Perry (Journey)
Ronnie Van Zandt (Lynard Skynard)
Ronnie James Dio (Rainbow, Black Sabbath)
Roger Daltrey (The Who)
Paul Rodgers (Free, Bad Company)
Bono (U2)
Bob Seger
Bruce Springsteen
Phil Collins
Greg Allman
Peter Gabriel
Sting
David Lee Roth
David Gilmour (Pink Floyd)
Ray Davies (The Kinks)
Bon Scott (AC/DC)
Cat Stevens
Brian Johnson (AC/DC)
Bryan Adams
Steve Miller
Roger Waters (Pink Floyd)
Michael McDonald (The Doobie Brothers)
Tom Petty
Peter Wolf (J Geils Band)
Lou Reed
Levon Helm (The Band)
That's about it for now....