Oh God, this is more fun than I had hoped it'd be!
This model works well with the villager models, reasonable with both the Arthas and the Paladin model (hair goes through, but it's not noticeable, I swear.), does not work with Priest, Knight, Demon Hunter or Kobold Shoveler because their head attachment point is apparently either directly on their chin or floating above their head...
EDIT: Fiddled with the positioning, just might work properly with Arthas and the Paladins now.
witch, hunter, hat, warhammer, is, awesome, badass, attachment, cap, head, brown, belt, what