Napoleon Dynamite.

Napoleon and Deb share a tender game of tetherball, Pedro wins the election, Grandma gets home safe from the hospital, Kip's relationship with Lafawnduh finally gets serious. Even Uncle Rico (the closest thing the movie has to a villain) gets reunited with his sweetheart. What's unique about the ending is that nobody learned any lessons, nobody underwent some grand transformation. These people just went on being their normal, weird selves and still managed to have their happy endings.