ease up turbo its to hard to pick just one. There are so many variables.
Yeah your right.
1940 - Bf109E, Spitfire Mk 1, Buffalo, Spitfire Mk 2, He-111
1941 - Fw-190A, Bf109F, Zero, Spitfire Mk5, P-40 Warhawk
1942 - Fw-190A4, Spitfire Mk XI, Bf-190G-4, Wildcat, Aircobra
1943 - Corsair, Lightning, Hellcat, Mustang, Thunderbolt, La-5, Fw-109 A5
1944 - FW-190 Dora, Tempest, P-51D, P-47D, LA-7, Bf109-K, B-17
1945 - Me262, Ta-152, F4U-4, B-29, P-47N
Oops, I just listed every significant airplane produced. Kinda took the fun out of picking just one!
I'm just messin' with ya Watanbe. (Dont blast me too hard)
I know it's hard to pick just one due to so many different factors....and sadly I still left out a bunch of planes.