I still see no Paso or Arabian in this horse. Pasos very seldom have that much white on the face, whereas it is very common in TWHs. Pasos are also more slightly built in bone. The famed TWH, Gens Armed and Dangerous, has many kids and grandkids, marked like the OP's horse.
Paso is def the knewest breed to add to his list :) I see the twh and arab be of the way his head and neck meet and other things being shoulders and hinds etc.
Ihave never seen a paso in my area but who knows lol :)
Well He looks to me like a Arabian x some find of Draft. He for sure has a Arab look that is my best opinion. The reason why I think he has draft is because what you said about the feathery legs. Hope that helped.
To be honest as I was looking at the stance of the guy I also thought draft x. My first thought is Belgian Arab x. There is something very "drafty" in stance of the last pics. The width between the front legs in the black and white pic says draft to me also. Just my opinion - can't explain the gait though Lol.