Lost
One of the greatest episodes and endings of all time, very easily a 10/10. People might argue that not every single mystery or question has been answered, and although that is true, that doesn't change the fact that the entire show is basically a character study and not a mystery show with cliffhangers every episode. Damon Lindolf prioritizes character resolutions over answering every single mystery (you could see this in his other shows like The Leftovers where he chooses to focus on the characters significantly more than explaining why 2% of the population just suddenly disappeared) because that's not what the most important thing is. The church scene is one of the greatest scene, peaks in a TV show of all time. Every one complaining just didn't understand it, spread bullshit about how everyone was dead the entire time even when it was explained what happened in the island is all real, and watched it as a mystery show instead of watching it for the characters. This show was ALWAYS about the characters. It was about deeply damaged, flawed, broken characters learning how people connect, about people moving on from your past and about people developing and changing together. As Christian told Jack, '"The most important part of your life was the time that you spent with these people. That's why all of you are here. Nobody does it alone, Jack. You needed all of them, and they needed you." This line tells you everything you need to know. Again, this is one of the most misunderstood endings ever, it is undoubtedly a 10/10 episode because of it's masterful character resolution and thematic closure.
*won't count as a film because it's episode 17/18 of TV show Lost (2004)