Donovan Waite is great but I am confused by the idea of him not doing breakfalls. He does, and teaches, masses of them constantly. He does them well in such a way that they are as safe as possible, and teaches others to do them well, but that's the _opposite_ of not doing breakfalls...
I think of Waite Sensei as being quite athletic, which is impressive given his stature and build. I like the way he teaches ukemi within a logical system with the overall aim of minimising impact on the body, though I'm not sure how much his methods apply to an arbitrary body type.
I've seen him a couple of times over here and enjoyed his classes. I believe he is still based on the US East Coast. I recommend his ukemi DVD(s).