Qi Peijia
Honestly, if not for the latent danger of him messing with the World Tree Civilization early I would be inclined to just leave him alone. If EsGod isn't inclined to commit crimes for the sake of committing crimes, and has left behind his esper stealing ability in his old body, then it honestly might as well be a new slate. Live and let live. EsGod seems to lean a bit towards enlightened self interest perhaps. He committed crimes before because it benefited him. Now he doesn't commit crimes because they do not. As a valuable direct Beyond Grade A of the Empire it benefits him more to behave properly. Han Xiao could easily just leave him alone, and he would eventually outscale him with his system-assisted growth. By the time EsGod is prepared to actually do something for a power grab then the influence and power of Black Star would be to a degree that he could slap him down with impunity.