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If you mean director-wise, the answer is George Lucas. The only films that George Lucas did not direct, but still was a part of, were The Empire Strikes Back and Return of the Jedi.
He didn't direct any! The prequel trilogy and the first film were directed by George Lucas. The Empire Strikes Back was directed by Irvin Kershner and Return of the Jedi was directed by Richard Marquand.
Lawrence Kasdan George Lucas
George Lucas directed Star Wars (1977), Star Wars- Episode I: The Phantom Menace (1999), Star Wars- Episode II: Attack of the Clones (2002) and Star Wars- Episode III: Revenge of the Sith (2005).Irvin Kershner directed The Empire Strikes Back (1980) and Richard Marquand directed Return of the Jedi (1983).
Biography - 1987 George Lucas Creating an Empire is rated/received certificates of: Australia:PG
George Lucas came up with the stories. As far as screenplays, he did the script for A New Hope, and Leigh Brackett & Lawrence Kasdan wrote the script for Empire Strikes Back, with Lucas and Kasdan for Return of the Jedi. As far as the prequels, Lucas wrote Eps. I & III, and he wrote Ep. II with Jonathan Hales.
Biography - 1987 George Lucas Creating an Empire was released on: USA: 27 January 2002
No, it was not just George Lucas. George Lucas came up with the stories. As far as screenplays, he did the script for A New Hope, and Leigh Brackett & Lawrence Kasdan wrote the script for Empire Strikes Back, with Lucas and Kansdan for Return of the Jedi. As far as the prequels, Lucas wrote Eps. I & III, and he wrote Ep. II with Jonathan Hales.
In Production order: The Empire Strikes Back In Chronological order: Star Wars Episode II: Attack of the Clones
George Lucas directed most of the movies except for The Empire Strikes Back (Irvin Kershner) and Return of the Jedi (Richard Marquand).George Lucas did Episodes 1-4, Episode 5 was directed by Irvin Kershner, and Episode 6 was directed by Richard Marquand.
Star Wars V: The Empire Strikes Back
In the original trilogy, George Lucas directed only the first film. "The Empire Strikes Back" was directed by Irvin Kershner and "Return of the Jedi" was directed by Richard Marquand.