Man, I love Jurassic Park, but IMO the dopey "It's a UNIX system!" scene alone drops it below Jaws. I'll agree that it does have better effects and better-choreographed action, but in terms of story/character/dialogue I don't think it's close, Jaws wins hands down.
I would keep every Spielberg on the list except Saving Private Ryan. Good movie, but there are enough war movies and this isn't so clearly better than the other ones.