The Great Deliverer is the main antagonist of the episode "Whacked to the Future." He rules California (in the future) with an iron fist, and intends to force all dogs into obedience school, especially Charlie, who came from (what was then) the present. His minions are future, robotic counterparts of Carface and Killer.
It turns out the Great Deliverer is a descendant of the mailman Charlie barked at through a voice projecter. For this, the Great Deliverer then decides to discipline the others, especially Charlie, whom he starts with by zapping him.
Because this future turned out to be a nightmare, Charlie made amends with the mailman by giving him a package.
It is unknown who voiced the Great Deliverer.