Well, last night I made some progress on the Germans, after doing some more online research. I now have a satisfactory Panzer Company, short 1 tank. So a complete unit of 16 PzIVs is ready to seriously threaten the Allied forces.
To accompany the tanks, I've sorted out a complete Panzer Grenadier Platoon with their half-tracks.
I've got elements as yet undetermined for an assault gun platoon, an armored car platoon, and possibly a heavy tank platoon.
I'm thinking that the panzer company and panzer grenadier platoon, as well as possibly some support units, will be designated as being from a panzer brigade. Other infantry and support units will be from separate units.