Poe Dameron
I'm slowly making my way through all the awesomeness that is The Force Awakens. Poe Dameron has a pretty small part, but his snappy one liner count is topped only by Han Solo (probably higher considering how many lines he has in all).

Poe: "Why are you helping me?"

Finn: "Because it's the right thing to do."

Poe (astute): "You need a pilot."

Finn (chagrined): "I need a pilot." 

That movie's got such wonderful dialogue.