I think some European-type Warmbloods (including the very demanding licensing/inspection process), some Lusitanos, some Lipizanners, and then just exceptional individuals of many breeds.
Too, what succeeds at the top levels of sport vs at the local/family horse level...that can vary a lot.
"I didn't mention..."
No, but draft breeds are often held up as great dressage horses.
There are different types of 'draft horses'. There are the extremely heavy giants built for slow work, about the farthest from a riding or dressage type. People often defend draft breeds for dressage by arguing that they are part Arab, or that they were used by knights for jousting(the knights did not use giant heavy drafts for jousting)...I can't follow the logic of any of it.
Personally I think it's cruel to take an animal built for a very different use and make him do something so far from what it's made for. The animal may try its heart out - that doesn't make it right.
Draft crosses are another, tougher area, and they aren't new - I used to see one Georgia breeder's crosses in dressage classes in the mid 1970's. Half drafts often run rather heavy and may not tend toward a sport horse build or gaits. Quite a few of the ones I see, are surprisingly heavy, and even look full draft despite a Thoroughbred parent. Over the years, it seems to me a good many of them have been in eventing and dressage, and they have a lot of trouble coping physically if they are really heavy animals. I've seen a fair amount of stringhalt and hock problems in the really heavy specimens if they were put into fast or strenuou riding work. I believe a heavier animal strains all joints more, and just based on engineering and physics, would expect to see more leg problems in them.
The trouble with the heavy pulling horses, is that they tend to have a very earthbound gait, kind of a grand shuffle. Even if they are 'hitchy' and bring the knees up way high, they don't have suspension (time with all 4 feet off ground).
The 1/4 draft cross, now that's a little different. That can make a nice horse for many different uses, and be fine for lower level dressage. Still, one that's going to excell at the top of dressage, that's unusual.