Welcome to Discuss Dramatica @mattrhoden! Nice to see a new face.
I will take the super easy route and link you to this article:
So that is a nice big list to start with where MC ≠ Protagonist (since IC = Protag). I think it was inspired by this thread (which is worth reading as it has a few more suggestions): Influence character who is also protagonist - #19 by RailwayAdventurer
In addition there is this thread: Recent Movies/Limited Series where MC ≠ Protagonist
You may be able to find more using the Search function.