I've met two. One of the best possible result of a weird cross. Looked like an Arabian, with a TWH gaits and personality. Decent conformation, but not perfect.
The other was probably the worst. He had an Arabian head attached to a plantation TWH body with dainty little legs, a thick neck, and no hind end. Just... Fugly, fugly horse. He gaited occasionally (paced, rather) but mostly trotted. This horse was nice enough -- he never had a malicious intent-- , but he was prone to uncontrollable spooking and claustrophobic "panic attacks." Maybe that was training related, but his conformation was just a nightmare. A regular Frankinhorse.
I have a TWH and
an Arabian. I've fancied having the best traits of them both in one horse... But that isn't really how breeding works.
It isn't that predictable. If I found a good one already grown, it would be great. But I'd never make my own.