I would have to say Twelve Kingdoms, or Juuni Kokki. It's a fantasy that takes place in modern times, but mostly on another world that is definitely more Middle Ages with swords and kingdoms. It has quite a few interesting creatures and such a good plot. I wish they had kept the scabbard monkey thing going on longer, the inner turmoil thing was really interesting. It doesn't really have any romance or that much humor but it keeps me interested. I haven't finished it all yet, I think there's 40-some episodes, but it's definitely worth a try. I've never heard anyone mention, seen any merchandise, or cosplayers. I found it pretty much on accident.
Awesome show! Watch it!
Also, I wouldn't call Death Note underrated at all. I couldn't go around a corner last con without seeing an L or Light.