FrozenNorth
Hero
The classic demon queen is Lloth, who is of course, more about vengeance, power and control rather than burning down the world.I go by the 4e approach. Devils want power and want to be the ones on top. Demons want to watch the world burn, either to enjoy the fire or because they are creatures of flame and want to make the world theirs and uninhabitable for its current occupants. The succubus was moved in 4e from demon to devil because they are about control and corruption. A stereotypical demon would be a Maw Beast - a walking hungry thing.