Abadom
Artermis or Haruhime as it helps building MC character and his own views. Thought about hestia but little hesitant it first may cause it to be weird with loki, hephaestus or other gods and their families mostly Freya. So building with a mortal or the fox girl or having a good partner such as artermis and her family may be good start.
Would you consider a story where the MC is an evolving monster in the dungeon? Born in the upper levels and making his way downward, killing and devouring becoming stronger? Maybe give him the looks of the Beast Monarch from Solo Leveling. Could make the Plague Monarch his subordinate, maybe even have Kaiju like Godzilla be mutant monsters that follow him and are his generals in a sense. Like a mutant Silverback for King Kong and a purple moth for Mothra. Just an idea i was considering but havent put into words yet. Maybe you could do something with it.