Also Life Like provides a list of its favorite directors of cartoons of the seven-minute variety:.
The “100 Important Directors of Animated Short Films” list is not intended to be comprehensive. These are simply 100 directors whom we feel are important and deserving of increased recognition by film lovers.
But it's still pretty thorough. There are a lot of directors here who are known for their longer work: Lasseter, Wlfred Jackson, Frank Tashlin. But it's a fine compendium of artists who made their mark in an important corner of the movie business.