9. The T-800 ('The Terminator')
Basic Function: To kill any human being that stands in the way of Skynet's attempt to take over the entire planet. The plan after that is unclear. What would a post-human world full of Terminators that seem to only know war be like? Would they peacefully coexist, or would they form factions and turn on each other?
Good or Bad: The vast majority of T-800s are pretty bad news if you're a human, but the model we meet in Terminator 2, Terminator 3 and Terminator Genisys has been reprogrammed to protect John and Sarah Connor and thus is quite good. If any one of these things can be caught and reprogrammed to protect the life of the leader of the resistant movement and his mother, it seems to be a pretty big design flaw. Future programmers should input a program that says, "Under no scenario, are you to help the Connor family in the past, present or future."
Boldest Action: There's almost too many to pick from, but we're going to go with the scene in the original movie where he rams his car into a police station and mows down a whole fleet of officers in an attempt to kill Sarah Connor.