Yeti

A hulking, shaggy abominable-snowman type glimpsed among Futurama's parade of oddball aliens and creatures, the Yeti carries all the mythic menace of legend while existing, as ever in this universe, purely for a quick joke rather than any grand plan. He lumbers, he growls, he vanishes into the gag.

Maurice LaMarche, a voice actor capable of booming gravitas, brings just enough theatrical weight to a throwaway monster to make the joke land twice: once for the absurdity of a Yeti turning up at all, and once for how seriously he sounds saying whatever ridiculous line he's given.