Charlie Fortner is the President of the Texas Association of Propane Dealers and the most powerful man in the Texas propane industry. He first appeared in "Hanky Panky" as the beginning of the episode, where he announced that Hank Hill won the Blue Flame of Valor award. He then appeared in "Meet the Propaniacs" where he was an audience member in a Propaniacs show. He would then be forced against his will to perform in the show, where Joe Jack dressed as a baby asked him for a new diaper after his falls off. As Fortner tries to get off the stage, Hank, as Gas Cop, frisks him and, much to his shock, discovers that Fortner wears adult diapers. Later on, Fortner yells at Hank, thinking everyone knows about his wearing diapers, despite being an innocent coincidence. He would then threaten to fire Hank if the shows continued, bringing in an end to the comedy group, though they did try to play in a mall, where his influences could not reach. He is also a member of the Board of Governors of the National Propane Gas Consortium, as revealed in "What Happens at the National Propane Gas Convention in Memphis Stays at the National Propane Gas Convention in Memphis". In that same episode, it's revealed he has a wife who is a member of the "Platinum Circle", a group of women whose husbands are in the consortium.
He was voiced by Lane Smith in his first two appearances. In his final appearance Fortner had a non-speaking role, arguably due to the death of Lane Smith several years prior to the episode's airing.