14. Boyd Crowder, 'Justified'
The Joker to Raylan Givens's Batman, Boyd Crowder was the villain whose existence makes the hero possible. Thanks to actor Walton Goggins (who's name sounds the moniker of a Justified villain), Boyd's Southern-friend charisma helped him blow past a demise the writers planned for his very first appearance and made him as indispensable to the show as Timothy Olyphant's straight-shooting protagonist. Through his many reversals of both fortune and morality, his compelling presence was a consistent throughline no matter which side of the law he wound up on.