Best: Six Feet Under
As far as we're concerned, HBO family drama Six Feet Under is still the gold standard in finales. It satisfyingly wrapped up the story of the Fisher family and friends by killing everyone. Literally — it ended with a series of flash forwards showing how every major character died. It sounds cheesy, but on a show that was all about the beauty of life and the power of death, it was perfect (and actually way more uplifting than you'd think).