Star Wars: Episode VI - Return of the Jedi

This movie might not be as flawless as the first two but everything involved with those throne room scenes were some of the highest points in the entire saga, the conflict between luke and vader, the emperor himself finally showing up for the first time and he's so good at being this manipulative evil, the final lightsaber battle is just breathtaking with that amazing music by john williams and the beautiful ending of the film that brings everything together, those moments alone makes this one of the most underrated in the whole franchise and in my opinion it's the second best movie behind the empire strikes back.