- Chad Mitchell Trio
- The Highwaymen
- Glenn Yarbrough
- The Limeliters
- Pete Seeger, Bess Hawes, Woody Guthrie, Burl Ives, Studio Chorus, Union Boys, Holly Wood, Dock Reese, Lou Kleinman, Lee Hays, Butch Hawes, Fred Hellerman, Ronnie Gilbert & Weavers, The
- The Rooftop Singers