Not only is this android officer of the law willing to help human beings, he was once one in a past life. Veteran policeman Alexander James Murphy died in the line of duty at the hands a ruthless Detroit gang in this 1987 action movie classic. A technology company with a contract with the police force to "serve the public trust, protect the innocent and uphold the law" resurrects Murphy to become Robocop. This guy is willing to take all the kinks in his armor from ammunition instead of humans taking shots to the heart. That is really nice of him.
The Terminator ("Terminator 2: Judgment Day")
This Will Smith science fiction extravaganza features a future where robots have been programmed to be servants and live in perfect harmony with human beings, which turns out to be not so perfect. When an android culprit called Sonny is suddenly responsible for a murder, Sonny tries to assist the police in finding the true killer. Sure, it may sound like Sonny has a selfish motive to help humans, but who would not be concerned about being accused for making someone else's ugly mess?