I've heard great things about Michelle Alley in Madisonville. I have only met her once for a lesson BUT in that one lesson she helped me with a first barrel issue that my horse has had for years. She was super patient, very on task and her horses looked great (condition and manner wise) that she brought to ride.
Schyler Magdziak in Palestine is awesome as well, she's usually booked up but you never know.
Good luck!