Another couple of good films are "waterloo" which had an amazing amount of extras made up of soviet soldiers and "The battle of Britain" which used so many planes that the film makers had one of the worlds largest fleets of warplanes available to them.
I can't believe people have missed "Where eagles dare", "Lawrence of Arabia", "Bridge on the river Kwai" and "The eagle has landed", all of em classics.
Mind you some of the old British black and white films were quite good as well. "The dambusters","cockleshell heroes" and "Dunkirk" were pretty good.
But I guess that quite a lot of old British films don't actually get aired in the US very much.
