1, 2, 3, 4 in that order. I guess not very many people love 2 that much, although Gene Siskel had it in his 10 best of the year list (and later on he'd put Under Siege in his top 10 too).
3 was a lot of fun, but it did seem like they had a bunch of action sequences they already came up with and needed a story to link them together.
4 was a decent action movie, but it didn't feel like a Die Hard movie. The PG-13 neutering probably had a lot to do with that.
Tom Rothman gave us a Brett Ratner X-Men and a PG-13 Die Hard -- but at least he didn't give us a Brett Ratner Die Hard.