Pazuzu, Futurama
Pazuzu achieved great notoriety in The Exorcist as an unpleasant sort we’d rather avoid at all costs. On the other hand, Futurama’s Pazuzu—Professor Farnsworth’s wayward pet gargoyle, his “faithful fiend” who he put through college, and who speaks with a French accent—saves the day on multiple occasions, springing the ancient scientist from prison and swooping in to save him from drowning in the surprisingly perilous Fountain of Again. (Can a demon, or technically a demon-like creature, be a deux ex machina?)
