Again, this is all personal preference. But were it me, I would have the top of the rhino 1/4 - 1/3 down from the top and the base of the larger buffalo mount 1/4 - 1/3 up from the bottom of that space. I think that would look proportionally correct. (Though, I would have to see it ) Because the buffalo are different sizes, I would try the one on the left aligned bottom with its mate. It might, however do better aligned center to center. Just have to try it. And trust your bride. It is going to be a great place.
And I am bitterly jealous about all that tall wall space.
And I am bitterly jealous about all that tall wall space.