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We too often forget the E. Front.
I sugest the La-5/7 and the Yak 3/9.
LA-7 and Yak 3 do not make the time limit. They are too late.
What about the P-51A/Mustang I? That was very competitive at low levels.
Mustang I/P-51A were fastest under 15,000ft of those mentioned that fullfill the criterias
OK with the La-7, but the Yak-3 was in production and used in numbers in the battle of Kursk.
Recently I read about a trial comparison between the Typhoon, Fw 190A (captured) and Spitfire (dont remember the Mark). The pilot of the Spitfire recounted how the Spitfire was included just to show how much of an improvement the Typhoon was over the Spitfire. While all the observers were curious who would have won in the Typhoon-Fw 190 battle, it was the Spitfire who left them behind.
Don't remember which version that was. The Mk XII or maybe a modified Mk IX? Also, the Fw 190 might have been worn out a bit as is so often with overly tested captured aircraft.
It was a Mk XII, the first mass production Griffon Spit in service. Single stage Griffon IIB.