The theme song to 2001, by the way, was not written for the movie itself. It's actually Strauss' Also sprach Zarathustra "symphonic poem", which predates the movie by about 70 years. My personal preference would be to not count it as a true "theme song", as it wasn't specifically for the movie.
And a little trivia: four of the movies you list - Jaws, Raiders, Close Encounters, and Star Wars - were all scored by John Williams, who also did ET, Jurassic Park, Schindler's List, Superman, Saving Private Ryan...and a hell of a lot of other work. Very good and very prolific composer.