Angus,
The post war Yak-3 with a VK-107 engine would be superior. The wartime Yak-3 with a VK-105 engine would be more agile, but slower than our VK-107 powered Yak-9U.
I wasn't saying that there are no aircraft left to be added that won't be hangar queens in the MA that also played a significant part in WWII, just that those are a pretty small fraction of the number of aircraft yet to be added.
Perk planes such as the A-26, B-29, Meteor Mk III and Mosquito B.Mk XVI are kind of forced into being semi-hangar queens at best (Tempest Mk V, Me262, F4U-1C) and true hangar queens at worst (Spitfire Mk XIV, Ar234, F4U-4, Ta152 prior to unperking) so I don't really count those. Once you remove the aircraft that will be perked from the list it gets quite short indeed and is mostly low production Axis bombers.