I’ve always thought of him as more of a champion than a messiah. He didn’t really bring about any big change. He struck a blow for the good guys but it didn’t overthrow the empire or anything.
Luke wasn't the chosen one. He didn't bring balance to the force or any of the stuff the prophesied one was supposed to do. Vader was the chosen one, who became bad, then brought balance when he killed the emperor. Luke was just the hero who became the catalyst to make the prophesied one do his job. The only correlation between Dune and Star Wars is that they both take place in space and not on Earth. There ends the similarity.
Even from "The Seven Samurai."