Megatron, the feared leader of the Decepticons. Wasn't always a warmongering tyrant. It was only due to being abused by a corrupt system as well as being betrayed by his brother Orion Pax. That he took the mantle of leading the Decepticons to a better Cybertron. But over time and years of conflict, ideals can change. As do leaders, Megatron changed and became as corrupt as the Cybertron he was fighting against. Killing for sport and teasing his brother of never changing his ways. From his master, The Fallen he discovered an artifact from the Original Primes that could bring life to any planet. Megatron wanted it to conquer Cybertron and the galaxy. He was desperate for this power that he'd chase it to Earth and be left there in stasis lock for some time. Feeling its power and becoming mad.

I would like to have you try with Frank Welker's Megatron. But you can try with Hugo Weavings also.