Leia is such an NF. She was on cocaine during the making of the movies. ENFJ, i'd say. To say that she is an ENTJ is crazy since her very appearence screams out loudly that she is a weak bastard.
I do not want to type Yoda. That little green bugger has way too many personality layers to be judged. Somehow the idea of typing Yoda makes me feel dirty He's holy, dammit!
Obi-Wan is almost like master Yoda in the earlier movies (4-6), he have almost disregarded his own personality in favor of wisdom. In the newer movies he is almost definitely ISTP.
Darth Vader and Palpatine are two variants of ENTJ. The Sith lords in general seem to resemble ENTJs. A few examples that screams ENTJ to me are: Exar Kun, Darth Revan, Vader, Palpatine, Count Doku, Darth Malak and Darth Bane.
I can't give Chewbacca a type, cause there is no way I could understand what he is saying. I might be hairy, but I don't belong on Kashyyk.
Han Solo: NOT an introvert. I'd say ESTP.