So I was thinking about the differences in Marvel/DC when it came to WW2. Depending on what continuity we're working in the allies on DCs side were rocking alot of heavy hitters including Superman. To explain why they dont just assault Germany directly and win the war they said "Hitler has the spear of destiny, with it he can control any superheroes who enter germany" meaning that they had to effectively fight everywhere BUT Germany.
Marvel on the otherhand had mostly Captain America Types or people with a single variable power (Ice/flight etc). Then we come to Namor. Who is a tank.
Now I know the Axis had various super goons of their own but I can't legitimately think of any equal to Namor.