When I was in Jr. High, one of the old local fliers (he was a Sophomore!) had a Berkley Grumman Guardian. It did loops, but didn't appear to have anything like a "corner". It did very magestic takeoffs and landings, however. I seem to recall that Bill Netzeband did a revised version with flaps that might be Classic legit. Check with Tom Dixon for plans...maybe.
If you want an OTS model, there are four that I would consider: Jamison, Humongus, Big Job and Barnstormer. Paint 'em up like Navy...or Marines. But that's only if you want to be competitive. Those would fly well enough that you'd be fairly willing to actually practice with them, which would be a huge help.

Steve