Easy.
1.
Close Encounters of the Third Kind. Not the version you can find. The 1977 version (I'm still waiting for my phone call, G.C.)
2.
Raiders of the Lost Ark. Brilliant fun, not so easy to achieve (Exhibit "A" - the sequels)
3.
Jaws. OMG, one of the best movies ever made. Likely better a film than my first two faves, this one's a close, bitting at your heels (or worse) third.
4.
Schindler's List. I can't bear to even watch it, but it's easily among my faves. Genius.
5. A tie:
War of the Worlds. Sacrelige or no, it's tons better than the campy George Pal version from the 50's. The oft-told story has never been better told.
-and-
Minority Report. A wonderful noir thriller. Less good as a whodunnit than as a stylish styler.