2-0 you named them all lol, its amazing to watch all these movies in HD. They look current like they were just made. I guess i would choose Full Metal Jacket if i had to choose 1
lol, there were some other honorable mentions like Born on the Fourth of July (although that's about coming home from the war), Casualties of War w/Sean Penn & Michael J. Fox, Dead Presidents, Rescue Dawn, some others I'm sure..
To me Full Metal Jacket & The Deer Hunter aren't Vietnam War movies as much as they just happen to the be the war that is going on that characters are involved in at some point in the film. But that's my opinion of them.