At least as far as the original trilogy goes. Those worked because of collaboration.

The more control he had when the studio no longer had any say and he could do anything he wanted the worse the star wars movies got.

Mod Edit: some information on ‘auteur theory’…

‘Wikipedia page on Auteur Theory’: https://en.wikipedia.org/wiki/Auteur
‘Encyclopedia Britannica page on Auteur Theory’: https://www.britannica.com/art/auteur-theory
‘Learn About Auteur Theory’: https://www.masterclass.com/articles/film-101-what-is-an-auteur#what-is-an-auteur
‘Film School Essentials: Auteur Theory’: https://indiefilmhustle.com/auteur-theroy
‘Auteur Theory: What Does it Mean and How You Can ‘Author’ Your Films’: https://nofilmschool.com/auteur-theory-complete-guide