[Babayaro.]

Aliens > Alien > Alien 3 > Alien Resurrection

Aliens just beats Alien as it had the action which the first film was lacking, although, the first was still great as no one knew what to expect (for people watching when it came out). Alien 3 and Resurrection are still good films but nothing compared to the first two.

I enjoyed Prometheus but it's hard to compare it to the 'Alien' films as they are somewhat different