Who Framed Roger Rabbit. The subject of the sentence is “Who,” so “Who” is obviously the title character. Roger Rabbit, despite being in the title, is the object of the sentence.
The Wizard of Oz.
Roger Rabbit isn’t the main character anyway. Eddie Valiant is.
Also in the world of cartoons, Nemo is a supporting character in** Finding Nemo** - Nemo has a fair amount of screen time but the main character is Marlin.
JFK doesn’t appear a lot in JFK, a movie that takes place almost entirely after JFK’s death.
Mary is not the main character of There’s Something About Mary. Ben Stiller’s character is. And while we are discussing Ben Stiller, he is the main character of all the Focker films but each title names someone else - his to-be- in-laws, his parents, and his kids.
The Mummy is not the main chanracter of The Mummy; Rick O’Donnell is.
The character named in The Lord of the Rings: The Return of the King is Aragorn, but the main character is really Frodo. Or Sam. Itès not Aragorn, I don`t think.
Likewise Weekend at Bernie’s.
In Bringing Up Baby, Baby didn’t have a speaking part.
The Manchurian Candidate is neither Raymond Shaw or Bennett Marco. It’s Shaw’s stepfather.
The Rocky Horror Picture Show
He’s not the title character either, the man who shot him is.
In Bobby Z, Bobby is only a minor character. The main character is Tim.
Neither I nor Andy Warhol is the main character of I Shot Andy Warhol.
For that matter, my brother isn’t in O Brother, Where Art Thou?
Baby falls short of being the lead, but a speaking part is not strictly necessary - a strong case can be made for King Kong being a main character. Mighty Joe Young probably isn’t the star. Going the other way, Frankenstein might not be the main character of the 1931 version, especially given how strongly the Monster is associated with his name.
In Searching for Bobby Fischer they never find him.
Forgetting Sarah Marshall
Along Came Polly
In Sylvester Stallone’s unpopular (but surprisingly funny) comedy Oscar, the title character doesn’t appear until the wedding scene at the very end of the movie.
Movie star Roxy Carmichael never appears in Welcome Home, Roxy Carmichael. Nor does James Dean appear in When You Coming Back to the 5 and Dime, Jimmy Dean Jimmy Dean?
Virginia Woolf never appears in Who’s Afraid of Virginia Woolf?
Obviously you weren’t paying close attention to the brand of breakfast sausages served at the diner.
Other title characters who don’t get more than a few minutes of screen time:
The Hound of the Baskervilles
Moby Dick
The main character in Rachel Getting Married is Rachel’s sister.
Barney Stimpson is convinced the star of Terminator is the titular android, and the star of Die Hard is the villain, the on who literally ‘dies hard’.
Being John Malkovich, in which John Malkovich plays (is?) himself, but the main character is played by John Cusack.
Nitpick alert - in that film John Gavin Malkovich plays the character John Horatio Malkovich.
On topic, Pan appears nowhere in Pan’s Labyrinth, and even the faun from the original title doesn’t appear that often.
Or, for that matter, Henry IV - the main characters are Prince Hal and Falstaff.