Here's a good starter list:
Amboy Dukes
American Breed
Archie Bell & the Drells
Beau Brummels
Big Brother & the Holding Company
Blue Cheer
Blues Magoos
Blues Project
Bobby Boris Pickett & the Crypt Kickers
Bobby Fuller Four
Solomon Burke
Cannibal & the Headhunters - Land of 1000 Dances
Castaways
Chad & Jeremy
Chambers Brothers
Choir
Lou Christie
Petula Clark
Count Five
Crystals
Cyrkle
Dave Clark Five
Jacki DeShannon
Dixie Cups
Easy Beats
Electric Flag
Electric Prunes
Shirley Ellis
Every Mother's Son
Five Americans
Frigid Pink
Flock
Freddie & the Dreamers
Gary Lewis & the Playboys
Gerry & the Pacemakers
Lesley Gore
Grass Roots
Hombres
Human Beinz
Iron Butterfly
Jan & Dean
Jay & the Americans
John Fred & His Playboy Band
Kensington Market
Ben E. King
Kingsmen
Knickerbockers
Lemon Pipers
Barbara Lewis
Los Bravos
Mandela
Manfred Mann
MC5
McCoys
Mitch Ryder & the Detroit Wheels
Monkees
Music Explosion
Music Machine
Nashville Teens
Aaron Neville
Outsiders
Paul Revere & the Raiders
Peter & Gordon
Wilson Pickett
Sandy Posey
? and the Mysterians - 96 Tears
Lou Rawls
Otis Redding
Rhinoceros
Rivieras
Ronettes
Sam the Sham & the Pharaohs
Searchers
Seeds
Seekers
Shadows of Knight
Del Shannon
Shirelles
Nancy Sinatra
Sir Douglas Quintet
Sonny & Cher
Spencer Davis Group
Dusty Springfield
Standells
Steppenwolf
Strangeloves
Strawberry Alarm Clock
Surfaris
Swingin' Medallions
Swinging Blue Jeans
Syndicate of Sound
Them
Thundermug
Tommy James & the Shondells
Trashmen
Tremeloes
Troggs
Ugly Ducklings
Vogues
Wayne Fontana & the Mind Benders
We Five
Yardbirds
Zombies