I would recommend Jason Barber who runs Kings Creek Adventures. I have been out with him quite a few times and have learned a lot about Hybrids from him. He also catches a lot of nice fish! Big Crappie would be another but I believe they specialize mostly on crappies but have seen them on the Hybrids as well in the past.
I would give Chris Richardson with www.lakelivingstonadventures.com a call. He lives in Athens and will definitely put you on hybrids! They specialize in striper, hybrids, and white bass! They fish live bait and artificials. I've learned so much from them!