Those are just the ones I"ve seen, along with a few others I happened to think of while I was making up the list. They're not all great, and they're not all about American Marines storming the beaches, but if I can come up with a dozen from memory, there's got to be a ton of them out there that I haven't seen or heard of.
Also, with the U.S. in active combat in the Middle East, I imagine that filmmakers feel their production dollars are better spent producing contemporary war movies. (Which I would also think are cheaper to produce since they don't require scrounging for period-appropriate props and costumes.)
I am glad you spent the time dredging up those pictures to point out my comment about ww2 movies was off the mark. The main point of my comment was Selma sucks.