I would have to choose the following
Raiders of the Lost Ark (the definition of a serial movie franchise)
Close Encounters of the Third Kind
ET
Jurrasic Park (it was ground breaking for effects and story)
Saving Private Ryan (gritty action movie)
Poltergeist (almost as good as Hitchcock in his heyday)
throw in Indiana Jones Number 3 and 1941 as movies done by Speilberg and you are good to go
But I am not a big fan of Jaws....it was too contrived in a lot of ways....and while the acting was superb it seemed that it was more of a fishy movie the further it went along. Just did not make me want to see it over and over. Schindler's list was another of Speilberg's great movies, but it is not a movie I would want to see over and over and over. Catch Me If You Can was a moderately kind of crazy story that Speilberg does to take his mind of his serial hits.