The listing below is pretty comprehensive and may be adjusted as time goes on and I do more comprehensive research and evaluations of these individuals.

Farmer Brown
Butch Cassidy
Killer Cruz
Fuzzy Cupid
Haiti Kid
Ivan the Terrible
Tiger Jackson
Jesse James
Karate Kid
Frenchy Lamont
Cowboy Lang
Little Beaver
Little Bruiser
Little Brutus
Little Coco
Little Tokyo
Lord Littlebrook
Los Espectritos (I & II)
Mascarita Sagrada
Max Mini (Tzuki)
Mini-Mankind (Espectrito II)
Mini-Vader (Espectrito)
Mini-Nova (Mascarita Sagrada) 
Pancho the Bull
Sky Low-Low
Tom Thumb    
Tiny Tom