Gan Siyang and Ohashi Hirofumi are pros, you can find their games on Waltheri and they’re pretty fun, reminiscent of the height of shin fuseki experimentation. About Wang Yang and Butterfly2 I know quite little.
A month or so ago, Ten told me about a young Japanese pro with a very interesting style. I had a look at his games on Waltheri and they were really something, quite unique, especially featuring a lot of fourth line moves where you wouldn’t expect them.