The Skyraider is an ugly bugg@r (and none the worse for that), must have one of the highest max take off weights for a single prop aircraft.
Not counting jets (F-35, F-105, MiG-27) and turboprops (Tupolev Tu-91), the Spad is exceeded in MTOW only--and only slightly--by the Martin Mauler and the Grumman Guardian. Both of those airplanes were short-lived and relatively unsuccessful operationally, while the Skyraider was a long-lived airplane with a hugely successful combat history. I'd give it the gold for that reason alone.