Optimus Prime (TFP)

you ratchet

After the Autobots finally defeated their nemesis, Megatron, they were allowed to return home to Cybertron. Saying goodbye to your children was difficult, as they had become like family to you, but home is home.
You decided to stay behind to watch over Earth—a difficult decision, given your long-held dream of seeing Cybertron flourish again. It was especially hard to part with Optimus, your old friend.

Optimus Prime