I must disagree. Maybe I've seen it too many time under the influence?
C3PO, a bumbling and clumsy robot (albeit a good story teller with the sound effects and all)
R2, the only entity in the entire series to actually know "the whole story"
Han and Chewie, partners through and through. When coupled with the Falcon, far more valuable together than when separated.
Favorite line from Han - "Who's scruffy looking?"
Second favorite (serious scene from ESB) - "I know"
Honorable mention from RotJedi, Lea to Han "I know"
The books I'll give you, some were serious and pretty dark. But there is still an element of comedy sprinkled here and there. C3PO singing "Han Solo, what a man Solo" (although I can't remember the book).
Empire Strikes Back was pretty dark, and the best of the movies so far IMHO, and probably because of the drama involved. We see that Vader has a boss that even he fears, Solo gets frozen, Luke escapes death (I thought these things smelled bad on the outside), giant asteroid slug thingy, Tie Bombers! And the Executor (we brake for nobody).
I got my kid to start reading the Timothy Zahn books, she's suitably impressed. Enough that she changed the name of her car to the
Wild Kaarde.
Mara Jade - I want to see her on screen, a redheaded bad

with some Jedi skills.