A beautifully executed sculpt, but as others have stated, there is no lack of such busts. Do they sell because they are available, or are they produced because they sell? A chicken and egg situation. The Roman looks impressive. With a little conversion, the HJ Officer could be turned into a LRDG or SAS figure, or even a Royal Navy submariner (would need a roll neck jumper and cap and tunic modifications).
There are plenty of other WW II subjects available from the Allied side, apart from the Yanks, there were Brits, Canadians, Kiwis, Aussies, Free French, Poles, Norwegians, &c., &c. For the first four years of the war, it was Bomber Command and after 1941, the USAAF which took the fight to the enemy, and the Royal Navy and Royal Canadian Navy which did so at sea.
Keep on sculpting,
Mike