Re: Fatal Flaw?
Scout is the narrator, not the main character. It's like saying that Nick is the main character of Gatsby. (Please, don't someone say that.)
And yes, you can tell LOTR with anyone being the protagonist. (See "Rosencrantz and Guildernstern Are Dead.") That doesn't change the fact that Frodo is the protagonist and main character of the movie as it exists now.
Steven, art is subjective, but the meaning of the word "protagonist" isn't. And it's not just semantics - your main character is your protagonist and his goal defines the plot of the movie. I'm not sure who's teaching you the theory that makes Sauron the protagonist of LOTR, or the Emperor the protagonist of Star Wars, but you should never talk to that person again, because they are giving you horrifically bad information.