Hercules fits this trope. Hercules was normally a nice guy and more than willing to help you out. However, there are several stories of kings cheating him out of payment only for Hercules to sometimes come back years later and kill them for having dared wrong him. The worst offender being King Laomedon of Troy who refused to pay Hercules AFTER he had witnessed the hero killing a sea monster sent by Poseidon. Hercules eventually killed Laomedon and nearly his entire family after sacking the city. What makes Laomedon even dumber? The monster was sent by Poseidon due to Laomedon refusing to pay him for building Troy's walls. The only guy that had any justification was Eurystheus, the guy who gave him his Labours. Because he had Hera on his side/back.
In Euripides The Bacchae, Dionysus is bullied by the local king Pentheus. Dionysus has just come back from a long trip to Asia Minor, and is excited to return to the city that his mother was from, and to have all the people in the city join in the festivities that have been established to worship the new god Dionysus. Pentheus is having none of that, so he outlaws the festival, kills a few of Dionysus' followers, and declares (loudly and openly) that Dionysus' mother did not in fact sleep with Zeus to produce Dionysus but was just a common whore and Dionysus is a bastard with delusions of grandeur and has him locked up in jail. This does not go over well with Dionysus. He causes the women of the city to go insane and go out to the forests to rave and dance and kill the soldiers in the surrounding towns, drives Pentheus crazy (and makes him cross-dress?), then lures Pentheus out into the woods, where his mother and aunt (along with the other women of the city) tear him into pieces and stick his head on a spear to parade it back into the city. Then he takes the madness off of them, letting them see exactly what they've done to their king.
In Norse Mythology, Loki does this to all of the Gods, but especially to Skadi, by gleefully telling her that he is the one who bares the responsibility for the death of her father Thjazi. He is able to do this due to the Sacred Hospitality law the Gods enforce and that he is Odin's blood-brother, making him untouchable. Then it backfires horribly when the Gods bind him for tricking Hödr into killing Baldr: Skadi places a snake above Loki that will drop poison into his eyes until Ragnarök comes.