Megatron

Megatron is the Decepticon leader, and a general of The dark side. he is rivals with Optimus prime and even managed to kill him but he got his left leg blown off by Noble 6. later on in the battle of cybertron he got his cannon arm cut off by prime but he was saved from death by Star scream. there are multiple Megatrons including Megatron minor (Bayverse), megatron Maximus (animated) and Megatron prime ( g1 megatron), they are treated as separate characters.