The classic Harry has an inheritance to a Noble Family story. Except his Ancestor was an asshole and now he has to clean up his Ancestor's mess.

Or in other words. Harry has to deal with the stress of fixing up a Hamlet and sending Mercenaries to deal with Pig Men, Inferni, Fishmen, and horrific Abominations from beyond. All while trying to figure out if his Ancestor or Voldemort is worse.

(Yes, its a Darkest Dungeon crossover prompt.)