They're all so amazing! It would be fun to see Shadesong in all of her outfits, if you have the time and inclination!
As for canon elves... aside from the more central characters, I'd love to see Ingen, Jarrah and pre-Wolfriders Rayek. They are Yurin's family, after all ( in some strange, alternate universe corner of my mind )..!
Ten Chiefs? Savah? Timmain's group of High Ones? There are so many I'd love to see, but I'm enjoying everything you do, so I'm not going to ask for too many. You have a long list already!
EDIT: Oh, and Ember in her teen outfit ( the one from "Right of Passage" and early HY ). This is when I "fell in love" with Ember ( liked her as a cub too ), she's my favourite female character and I liked her best as a teen. To quote her aunt ( on the Wolfriders in general, she's "so full of life's fire"!