Oppenheimer
Don't ask me why, but throughout the entire film, I had a lump in my throat and a pain in my chest, as if I were watching a tragedy from beginning to end—even in the moments when there was nothing 'sad' on screen. It's the first film that has achieved that effect on me; that said, I wasn't even close to crying, just sad.
It's only the second movie where I felt the music came alive and was telling me things that the characters couldn't (the first one was Interstellar, by the way).
The final sequence with Einstein, along with the scene where the president calls him a coward and shows zero humanity after murdering an entire city, were the highlights of the movie for me.
P.S. This is better than The Odyssey, and it's not even close.