I have been playing around with this idea for a while and hear is something I've been working on a F8F Pattern Bearcat.

Basically take a WW2 Scale fighter and stretch it out. Something like this.It's not a classic pattern plane but itis a classic. You could use wings from any classic pattern plane or come up with your own. As long as the plane can be trimmed true then and you can fly the patterns, why not.