What about a Troll Merchant - like Scamp and Mudcrab in Morrowind?
A Troll living in an unlikely area, with a swamp donkey pack animal. The Troll is a merchant with great, but random items: he buys and sells things for a higher price than all other merchants in the game. He can also have some really interesting conversation options regarding trolls and their history, lives, and their relationship with swamp donkeys.
I think it sounds cool. You guys?
