Dreadbot (Transformers)

The monstrous hooligan known as Dreadbot is a tough, destructive thug who's hard to control and even harder to kill. It seems a little weird that he transforms into such a stereotypical symbol of peace and love, but maybe he's just got a sense of humor—check out those Christmas lights.

The Last Knight film
Dreadbot was incarcerated by human authorities after a "bank robbery" in which he killed nine people and didn't actually take any money. He was one of the Decepticons whose release was negotiated by Megatron to help him hunt down Cade Yeager. The humans at first denied his release due to his crimes, but Megatron's threat of violence convinced them to reconsider and free him, provided he was fitted with a GPS tracking device. He followed his leader to Yeager's scrap yard and then to a nearby town but they were met with some not-quite-unexpected resistance in the form of the Autobots Bumblebee, Drift, and Crosshairs and damaged in a trap set by Yeager. During the fight, Grimlock arrived on the scene and Dreadbot died as the Dinobot snared him in his mighty jaws.