This probably wont help you any, but I rode a mare that looked like she could have been 'great dancers' sister. She was not the best put together, and certainly not flashy, but she had a huge heart and was one of the most safe, sane mares I've had the pleasure of riding.
See what you can do about confo shots of the new mare. Jumping wise she is looking like the best choice, although I stand by my original support of Great Dancer, though he'd need work. He's not the best jumper, but he moves nice and freely.
I am disappointed that the bay gelding moves the way he does. He looks so lovely in the pics and the most suitable for a H/J. However, I think you should check out the mare. She could have potential. It is a plus that she was never raced, hopefully she doesn't have any soundness issues. Good luck!
The mare (Honey) that turned into a lease is a very well photographed horse beautifully turned out with decent bone and a nice top line made nicer by over conditioning. Her shoulder is meaty and steep.
The Bay gelding is light boned and looks sore footed in the video. He moves exactly like a horse that has thin walled feet and needs a lot of farrier work.. maybe shoes and pads.. and maybe shoes and pads for life (there are Thoroughbreds out there that you just cannot keep a good foot on they have such thin hoof walls.. and it is not farrier issues or nutrition issues it is genetics).
The Chestnut, Dancer, is ho hum. Straight through the hock and the photo of him with a rider does him NO favors at all.
The Bay mare is OK. That does not mean spectacular or bad.. just OK because without a side shot for conformation it is hard to judge her. She moves OK. She steps over the fences OK. That is all that can be said.
I really liked the TB in the last video! She seemed to have a very nice way about her. I liked that she appeared well-controlled,& seemed to be a pretty mover. As well, she appeared to enjoy her job. She looked like a horse I would be happy to ride! Good luck researching her further!