Share 'Thoroughbred sires'

Does anyone have an opinion on which of the established Racing Thoroughbred sires produces suitable polo progeny? I know the mare needs to be taken into account, and that not all ex racers are re-trained for polo. But there must be a stallion that people have a pony by that has made a nice little pony? Maybe a Montjeu or Where or When? One of the current stallions must produce a nicer type than…