For a Sherman that fought at Normandy, I recommend "Derby" (#60258) which is an M4A1 with the cast hull. I have it and I love it.
Dragon Diecast 1/72 Armor, 60258 United States M4A1
I think the closet thing you're going to get to a Sherman that fought during the Battle of the Bulge is "Phantom" (60164), which is an M4A3(76)w. I don't have it, but it looks good:
Dragon Diecast 1/72 Armor, 60164 United States M4A3 (76)