[@Cuccoruler] from what I gather you want Thalios as a representative of the underworld but without the obvious power that comes with the aspect of being ruler? Nay, could Hades himself be so effective without absolute dominion? 
Others rule the continents and are set in their tasks. But all answer to the ruler of the Underworld and heed his command. All save the furies. 
If flemming disagrees to that then he will invite true chaos into the hierarchy by removing a clear source of command and rulership.
Make the right choice lest the gods of death and chaos try to make a claim. Elect a ruler by name before the pantheon before anarchy sets.