Photo by John Mark Kuznietsov at Unsplash
That may be easy or difficult to answer. In my case, these would be serious contenders:
Books: "The Screwtape Letters" by C.S. Lewis; "War and Peace" by Leo Tolstoy; and "The Warden" by Anthony Trollope.
Films: "The Battle of Algiers"; "Schindler's List"; and "Signs."