F4u race wing design
The MH 24 airfoil has been popular for years at international radio-control pylon racing events.  Just ensure that your chord and airspeed give you a Reynolds number exceeding 400,000.

Because airfoils designed for high speed often work poorly at low speed, consider equipping your model with flaps, to make landing easier.

At lower Reynolds numbers, the Eppler E220 has a good reputation.  It's also easier to build (more tolerant of inaccuracies) than airfoils in the mostly-laminar-flow MH series.