Maybe a Saddlebred/TWH cross, but I doubt pure Saddlebred. And Walking Horses also have a high headset, and nice clean throatlatch and head.
As for the "high tail" that you think was "broken"? Nope. What you are seeing is flagging more than likely, which every horse can do, if it suits them, from foals to aged. I've looked at the pictures of him you provided, and this horse has not been a tailset horse I would be willing to bet. And for that matter, tails aren't "broken" to get one to wear a tailset either.
TWH's and Saddlebreds share same older lines of horses. Gaines Denmark for example. And the Chief lines. Also same sires and horses figured in the Standardbreds. Tennessee Walking horse - The American Saddlebred Blood
Just be glad you've got one this versatile.