Limited to movies about WW II infrantrymen... no boats, POW camps, planes, or subs. And in no order.
A Bridge Too Far (Operation Market Garden...Monty's Folly that could have won the war 6 months early, but probably prolonged it by three)
The Longest Day (D-Day)
Saving Private Ryan (D-Day and following)
Kelly's Heroes (Comedy, but one of the VERY few films where you'll see the difference between a Tiger Mk I and a Sherman M4-A3...which was a joke in itself)
Stalingrad (German film)
Battleground (Battle of the Bulge: remarkable film considering that it was filmed so close to the war's end)
The Thin Red Line (Guadacanal..the most beautiful war movie, if that's possible)
Band of Brothers (The 101st from Normandy to Austria)
How I Won the War (Richard Lester directs John Lennon. Not a pro-war film.)
(There are so many others, but these leap out at me for not having any real weaknesses in acting, direction, score, or cinematography.