3. Lrrr, Futurama
Hear us out here: the ruler of Omicron Persei 8 (Maurice LaMarche) is a big, blustery horned space alien. But underneath the cape, Lrrr is really just your average middle-aged, disgruntled husband and father. He'd rather sit at home watching television than actually do any planetary invading, and he's already had one mid-life crisis. Lrrr's rants are always entertaining, and he's for the most part pretty harmless. But his sheer size would also dissuade anyone who wanted to give us an attitude.
Photo Credits: ABC, FOX, ITV, TBS, USA