While I would like a semi-symmetrical wing, I have found a number of good trainers.
One surprise: MegaTech's Capital Flyer where you can change the dihedral brace of the wing as you progress.
Also it has been mentioned that the Sig Rascal in either nitro or electric would be a good starter plane. The electric would be only rudder and elevator. But a cool looking plane that would have some "Sunday flying" possibilities after you have finished training.
One other plane is, surprisingly, the Watt-Age Super Impress (electric). The advantage of electric is that it has a lower start up cost than nitro. And they lend themselves to being park fliers once you advance.