MushroomGenius
Jarl of Fungi, Great Khal of the Mushraki
I think that, given the massive expanses of water in this game, fishing and boat piloting could be interesting. Perhaps to compensate movement in water should be impeded by armour, making water into a slight obstacle rather than simply being identical to land as it currently is. This would make more sense as a mod though, rather than a DLC.
I can just imagine the poor heavy-armored Orc unable to battle the current and floating downstream...