This is merely a personal list of people I consider to be the greatest NG animators, because of originality, style, etc. They are in no particular or peculiar order:

JohnnyUtah
ZekeySpaceyLizard
Celarent
Stamper
Kol-Belov
Ergoraptor
Sakupen
Catoblepas
Cerberusuille
Matzerath
Krinkels

More will be added later. Believe me, there's more.