Walt Disney: Directed a lot of his early shorts prior to Gillett and Jackson taking over the duties for him. His last short was "The Golden Touch".
Ub Iwerks: Directed some of the studios early shorts prior to his departure in 1930.
Burt Gillett: A prolific director for Walt's early 30's shorts, only to leave in 1934 for an ill-fated venture at Van Beuren Studios. He would briefly return in the late 30's. His most famous short was "Three Little Pigs."
Hamilton "Ham" Luske
Pinto Colvig: His sole directorial effort was "Mickey's Amatuers".
Walt Pfeiffer: Same as above.
Erdman "Ed" Penner: Same as above.
Clyde "Gerry" Geronimi
Norm Ferguson: Normally an animator, Fergy's sole short subject directing credit was "Pluto's Playmate".
Rudolf Ising: Sole effort was the outsourced short "Merbabies".