I think I'm getting an optical illusion / interference from his overlapping hind legs in the photo. That's throwing my assessment off balance. Really can't find anything major to fault him on, besides lack of condition (needs both fat and muscle).
I'm no confo expert, but any reasonably put together horse can jump. I'm sure he'll let you know what he finds to be fun soon enough. Expose him to everything you can think of and you'll find where his talent is. For now, while you're putting that weight on him, get him walking around on gentle hills to help him build up his engine.