Big, Thin, Short Trio

Western Animation

 * Ed, Edd n Eddy, in that order.
 * The main characters of Time Squad. Timerussel is big and muscular, Larry is thin and sleek, and Otto is short (well, he is a little kid).
 * Adventures of Sonic the Hedgehog: Dr. Robotnik (Big), Scratch (Thin) and Grounder (Short).
 * The Powerpuff Girls:
 * The series gives us the Not-so-Terrible Trio of The Amoeba Boys, consisting of Bossman (Big), Slim (Thin), and Junior (Short).
 * There's also the Ministry of Pain from the episode "Fallen Arches", consisting of Counterpart (Big), Mastermind (Thin), and Cohort (Short).