The combination makes it best. They all complement each other. A Han character would be more dull if there was no Luke or Leia to balance it out and vice versa. I like them all for different reasons.
Best answer so far.
It’s a bad answer! Of course the combo is what makes the film great, but the question is: Which one do you like best?
Wrong! It’s not a bad answer, it’s a bad question with no correct answer except that one. :p