I don't recall any mention of very long range fighters here. Its correct types like the Me110 were VLR by the standards of 1938, or the P38 in 1941. But what about airframe, engine, fuel, configurations to get the range of a P51 circa 1939? If not that then with twin engined airframes?
On a simpler level is there any practical reason to exclude drop tanks by 1938?
Guess we have a dedicated thread
The alternative long range fighters for the specified time frame, on the technology of the day. All aircraft-producing countries can compete, A/C can be with 1 or 2 engines; one or more crew members.