The Cri-Cri is definitely aerobatic, flown one and it's a fantastic piece of kit. The Beech 18 is probably not aerobatic but the yanks do it anyway (probably on an experimental Cat CofA), as is the Aero Commander that Bob Hoover used to fly...
Cant think of any other GA types at the moment..
But wait - The Grumman Tigercat that used to lead the balbo at legends....?