Not concerned with controlling anything, just self preservation.
Oh, I think I see what you mean. It's fairly clear that he is a J, and so if he is an E in combination with the J (and T), that would most likely lead to controlling tendencies, which he doesn't display at all. Gotcha.
Grabbing the weapon and taking over in the death star brig, "Get this walking carpet out of my way..." are ENTJ actions...
I'd agree Darth has no type, just a very warped childhood and orphan archetype.
Lucas definitely used archetypes more than types to define his characters. Stopped taking advice for movies 1-3 on character consistency whereas in #5 was wise enough to take advice on redoing some of Solo and others' dialogues. So if Aniken seems inconsistent it's because he is...(one of my relatives worked for Lucas for awhile...)