Actually, so many people had done them as the Star Wars already... Why not make them the cast of SpaceBalls?

John: But I could have been a cool Jedi!

Don't worry, now you've got tons of merchandise based on the Beatles! It will be, SpaceBalls the Beatles edition!

Ringo would play the tiny Dark Helmet, trying to get every drop of clean air off of Planet Classic-Rock and trying to advertize the Beatles doll set. "*Removes helmet* I can't breath in this thing!"

John would play Helmet's second in command, Colonel Sandurz. "Don't you mean Sanders?" No John, this has nothing to do with KFC. "I want KFC now!" Alright George, but after this chapter gets posted.

George would star as the main hero, Captain LoneStar. Or I guess I should say LoneStarR "Not funny." He will save the world and rescue Princess Pattie (A.K.A Vespa) from the Spaceballs! "Well tha- Hey! Is that a giant pizza?!!" And apparently will also eat Pizza the Hutt.

Paul would be starring as Barf. "BARF??!!! I PLAY A GUY CALLED BARF???!!!!" It's short for Bartholomew. Anyways, he's half man, half dog, his own best friend.

But if you really want to know which Beatle would be which Star Wars character, I would say:

John as Luke Skywalker.

Paul as Hans Solo.

George as Chewbacca.

And Ringo as C3PO.