Oh that it a tough call. I like several breeds, but since the thread gives a 3 limiit....they're all about equal and based on my personal experience and more time with these breeds. There are many breeds equally as fine. More into the "warm" breeds and not so much into the "hot" breeds.
Georgian Grande (specifically Friesian/Saddlebred), QH, TW.
But I certainly would not rule out the RMH, Morgan (both excellent breeds) or if I could get so lucky to find a throw back Saddlebred from what they had been 100+ years ago vs what most of them are today.