2001: A Space Odyssey, nothing short of a special effects masterpiece for it's time. Still looks good today!
Blade Runner: Again, amazing effects tying together a story on the value of life, from both Decker's and the replicant's perspective.
Tron: Innovative take of photographic effects, fresh story.
Robocop: A critique on the devaluation of life.
Star Wars: After many years of lackluster sci-fi this movie raised the bar whose achievements have not been equaled since.
Flash Gordon: Stayed true to it's comic 50's deco look with a kickin soundtrack by Queen.
..I'm sure if I tried I can think of a few more.
...exposing Forchetto's real identity since 2011...