Verily, I confess this folly to be most enjoyable. Is it Shakespeare? Actually…
George Lucas studied character archetypes and used them all in constructing Star Wars. One can see Rosencrantz and Guildenstern in R2-D2 and C-3PO. Luke follows the hero arch. Darth Vader corresponds to Othello when viewed through the larger scope of Episodes I-VI, or rather the Tragedy of Anakin Skywalker.