I've seen a lot of Studio Ghibli fans like myself and I was thinking the horse would be a great opportunity to add in some more references! The first one that comes to mind is Yakul from Princess Mononoke. Or Moro/her pups, the wolves from Princess Mononoke. Any attempts/thoughts/other suggestions would be greatly appreciated. I think I'd prefer Yakul myself. Thanks!
Tokiri has a rideable grey wolf that's pretty close, and he's currently working on a deer: http://community.playstarbound.com/...f-red-panda-update-red-panda-finished.110263/ You could always ask for him to do a small recolor on the wolf and alter the antlers on the deer. I would love to ride Yakul too.
Funny, just yesterday I tinkered Yakul as a horse replacement. It was actually intended to be just for my personal use and I'm not completely happy with the outcome, but after accidentally reading this thread I thought I could just as well upload it for others to use It looks like this: