This is an idea I've had bouncing around for a little while, but I don't see myself using it. Also, it was a nice distraction, so thanks for that.
-Quarter Horse or similar build
-Inverted dun: black base coat with dun points, dorsal stripe and barring
-Hooves may also be striped as per preference
-Tricolored mane, with light dun fading to black fading to white at the very tips because why not. Alternatives include:
~regular black mane
~dun fading to white (see facial detail)
~dun fading to black
-Very irregular blaze forming a "mask" over his eyes, not passing his top lip. This mark is symmetrical. (On an equine, I'd hope at worst this could be covered under a "small marking" allowance)
-Navy eyes
-Wings can be added on request, but would probably be black or tricolored
-Weird butt freckles are totally optional (they were a screwup but I find them charming)