Dragons early Sherman M4A1 is a good kit and is proper for Normandy, you can also add wadeing gear, dozer blades, or even do a Sherman Crab if you want something a little out of the ordinary as all of these showed up at D-Day. As for German armor at Normandy
Panthers, Panzer IIIs, Panzer IVs, Tigers, the Germans had lots of armor and used it all. If you wanted to do something out of the ordinary even a captured French Souma would be correct.