EoS Jio with low difficulty.......
After subjugating Satan and taking control of all his abilities, he can create the same explosion that pulverized a massive crater of 50km and vaporized all of the cities/towns in it, which stacks up to be something on the upper-end spectrum of country level.
RESPONDING TO THE EDIT:
Even if he can't win with power (which I'm pretty sure he still can), he has relativistic+ if not lightspeed reaction speed from his numerous laser-timing feats/powerscaling. He has Lucifuge, which can Jio can use to BFR himself to another dimension (like obito). But here's the catch. Whatever Jio "touches" will get sent to the same dimension. All 4 Kings wouldn't even have a chance to beat him once he's inside there.