This characters punches are as powerful as nukes, can survive being hit by several nukes, has nearly indestructible arms, can fly really fast, being able to reach space in seconds, has managed to invent interplanetary teleportation, knows about the afterlife, even making an ability that prevents people he killed from coming back to life, can destroy the observable universe by concentrating for a minute and does not require food, water or oxygen

The planet he ruled seemed pretty peaceful

A nice variant of a genie could also work