We have had TB/Clyde and TB/Perch horses through the barn a few times for training and as client horses. I would not recommend breeding this combination if you are looking for a “hunter/jumper” prospect, particularly if your horse already has some draft blood, for the following reasons:
They tend to be heavy movers, with short strides and lots of knee action.
In my experience, they don’t jump in the nicest form and don’t usually have nice, tight knees. For the hunters, it would be a waste of entry fees; for the jumpers, I foresee lots of rails being pulled past the 2’6" height. Build and way of going CAN be quite limiting, no matter how much heart they may have.
They aren’t always the prettiest things. Hunter judges like pretty and correct-ish movers, and draft crosses just aren’t usually up to par.
Why not breed to a sturdier built warmblood? Most European warmbloods, particularly the Dutch, do have many draft ancestors. Or, as a previous poster said, perhaps consider an Irish stallion, either Draught or sport horse, as they tend to have a bigger yet refined build and a nice way of going.
Thoroughbred/draft crosses are great in the hunt field, where jumping style and prettiness doesn’t matter. They are great for taller/heavier riders as well.