You may have already done them but Daenerys Targaryen and Drogo from Game of Thrones seem to fit your description. Or really Daenerys and another character for that matter.
Have you thought of characters from Fairy Tail? He could go with Gray or Natsu and you could always do Lucy or Erza. Puppets you could get creative with from that show, and there are some really elaborate armor pieces/weapons you could work on.
Otherwise I thought of Dragon Ball Z. I know it's old school, but you two could have your pick of characters and you could work on the dragon (even though it'd be a tiny replica of the dragon).
Hope that helped! You two look AMAZING in the picture by the way!