Honey Badger

These goofy weasel-like creature—best known for being the subject of a viral video—truly, as said video vulgarly suggests, don’t care. They’re notorious for their fearlessness, and go after animals either far larger or far more venomous (such as the cobra), then use their power jaws and sharp teeth to bring down prey, eating every last bit once they do.

For example: here are honey badgers taking on six lions. They don’t always win, but they also don’t care—and as such will fight to the death.