What are L/D ratio of famous WWII fighters?
Please find the answers below from "World war II fighter aerodynamics" by David Lednicer.

And L/D, of course, depends on the CL you are flying at but you can easily calculate it from the unambiguous drag area given 



Edit: Calculated L/D vs speed curves below for 4000m altitude flight. A fixed span efficiency was taken to simplify the calculation. Please consider this as an approximation only