The man who immediately comes to mind in this respect is Tom Read sensei in Arcada, CA. I have been training for almost thirty years and he does techniques in w ay I have never seen any else do it. He has a way of talking about what he is doing that is unique, very mathematical.
Unlike some "radical" types who can do all sorts of cool looking stuff as long as they are using their own ukes, Tom likes nothing better than to have some 4th or 5th Dan from any Aikido tradition whatever drop in and train. I have seen him toy with some very excellent folks who had every intention of bopping him him if they could.
His bojutsu work is extraordinary but you have to hear his explanation to realize what he is doing.