I think "Citizen Kane" is the greatest movie ever made. "The Wizard of Oz" is my favorite movie of all time. What do you think is the greatest movie ever made? What is your favorite movie of all time? Are they one and the same?
I also don't think there is a GOAT. I think maybe a best of a genre or an era. I have my favorites, but not all agree. If I can watch a movie again and again and not tire of it, then to me it is great. For me the Scent of a Woman with Al Pacino is one of those movies.