I thought 14 was a pretty high number to recommend. I see that as 2-3 years of work for HTC.
Pulling up Wiki and adding every other plane found that ever flew during WWII makes trying
to develop a short term addition list quite impractical. It would look something like:
Ambrosini SAI.207    1942     Italy    
Ansaldo A.120    1925     Italy    Italy, Lithuania
Arsenal VG-33    1940     France    
Avia B-135    1941     Czechoslovakia    Czechoslovakia, Bulgaria
Bell P-63 Kingcobra    1942     United States    U.S., USSR
Bloch MB.151/MB.152/MB.155    1940     France    France, Greece, Romania
Boeing P-26 Peashooter    1933     United States    U.S., China, Philippines
Breda Ba.27    1933     Italy    China
CAC Boomerang[3]    1943     Australia    
Caudron C.714    1940     France    France, Finland, Poland
Curtiss P-36 Hawk/Mohawk    1938     United States    U.S., Brazil, Finland, France, Netherlands, Norway, Thailand, UK
Curtiss-Wright CW-21 Demon    1939     United States    China, Netherlands
Dewoitine D.500/D.510    1935     France    France, China
Dewoitine D.520    1940     France    France, Bulgaria, Italy
Fiat G.50    1938     Italy    Italy, Finland, Croatia
Fiat G.55    1943     Italy      
Fokker D.XXI    1936     Netherlands    Netherlands, Denmark, Finland
Grumman F8F Bearcat[4]    1945     United States
Heinkel He 112    1937     Germany    Germany, Hungary, Romania
IAR 80    1942     Romania    
Ikarus IK-2 parasol monoplane    1935     Yugoslavia    Yugoslavia, Croatia
Kawasaki Ki-100    1945     Japan    
Koolhoven F.K.58    1940     Netherlands    Netherlands, France
Lavochkin-Gorbunov-Gudkov LaGG-1    1940     Soviet Union    
Lavochkin-Gorbunov-Gudkov LaGG-3    1941     Soviet Union    USSR, Finland
Loire 46 parasol monoplane    1936     France    
Macchi C.200    1939     Italy    
MÁVAG Héja    1941     Hungary    
Mikoyan-Gurevich MiG-1    1940     Soviet Union    
Mikoyan-Gurevich MiG-3    1941     Soviet Union    
Mitsubishi A5M[5]    1936     Japan    
Morane-Saulnier M.S.406    1939     France    France, Croatia, Finland, Italy, Poland
Nakajima A6M2-N floatplane fighter    1942     Japan    
Nakajima Ki-27    1937     Japan    Japan, Manchukuo, Thailand
Nakajima Ki-43    1941     Japan    Japan, Manchukuo, Thailand
North American P-64[6]    1940     United States    
PZL P.7 parasol monoplane    1933     Poland    
PZL P.11 parasol monoplane    1934     Poland    Poland, Romania
PZL P.24 parasol monoplane    1936     Poland    Poland, Bulgaria, Greece, Romania
Reggiane Re.2000    1940     Italy    Italy, Hungary
Reggiane Re.2001    1941     Italy    
Reggiane Re.2005    1943     Italy    
Republic P-43 Lancer    1941     United States    U.S., Australia, China
Rogožarski IK-3    1940     Yugoslavia    
Seversky P-35/J 9    1937     United States    Sweden
VL Myrsky    1943     Finland    
Vultee P-66 Vanguard    1941     United States    U.S., China
Yakovlev Yak-1    1940     Soviet Union    USSR, France
Yakovlev Yak-3    1944     Soviet Union    USSR, France
Yakovlev Yak-7/Yak-7B    1942     Soviet Union    USSR, France
(Then the heavies)
Bell YFM-1 Airacuda[2] flying cruiser    1940     United States    
Blackburn Roc turret fighter    1939     United Kingdom    
Blackburn Skua fighter/dive bomber    1938     United Kingdom    
Boulton Paul Defiant turret fighter    1939     United Kingdom    UK, Canada
Bristol Beaufighter    1940     United Kingdom    UK, Australia, Canada, U.S.
Bristol Blenheim night fighter    1937     United Kingdom    
Dornier Do 215 night fighter    1939     Germany    
Dornier Do 217 night fighter    1941     Germany    
Dornier Do 335    1944     Germany    
Douglas P-70/Havoc night fighter    1941     United States    U.S., UK
Fairey Firefly fleet fighter/dive bomber    1941     United Kingdom    
Fairey Fulmar fleet fighter    1940     United Kingdom    
Fokker G.I    1939     Netherlands    
Grumman F7F Tigercat night fighter    1944     United States    
Heinkel He 219 night fighter    1943     Germany    
IMAM Ro.57    1943     Italy    
Junkers Ju 388 night fighter    1944     Germany    
Kawasaki Ki-45 night fighter    1942     Japan    
Kawasaki Ki-102 twin engine fighter    1945     Japan    
Messerschmitt Me 210    1943     Germany    Germany, Hungary
Mitsubishi Ki-109 bomber interceptor    1945     Japan    
Nakajima J1N night fighter/interceptor    1942     Japan    
Northrop P-61 Black Widow night fighter    1944     United States    
Petlyakov Pe-3    1941     Soviet Union    USSR, Finland
Potez 630    1938     France    France, Greece, Romania
Westland Welkin high altitude interceptor[7]    1944     United Kingdom    
Westland Whirlwind    1940     United Kingdom    
~~~~~~~~~~~And that's just mono-wing fighters.  
