Breaking Bad and its spinoff Better Call Saul constitute one of the greatest fictional crime universes ever created. Peering with piercing clarity into the underworld of drug gangs and their cartel superiors in a way that few other crime dramas, if any, ever have, both shows naturally feature some of the most villainous gangsters ever portrayed onscreen. From fried chicken-fronted kingpin Gus Fring, to Don Eladio Vuente south of the U.S.-Mexico border, and even Walter White himself, both series deal primarily with ruthless drug barons living by the mantra of kill-or-be-killed.