Question: Who is Chef voiced by in the episode Cartman's Mom Is Still a Dirty Slut?

Context paragraphs:
Jack Lee (chef): Jack Lee (Lý Vinh Viễn) is a Chinese descent from Vietnam celebrity chef based in Ho Chi Minh City, Vietnam.  He is often referred to in Vietnamese media as "đầu bếp Hollywood" (the Hollywood chef) or "đầu bếp của ngôi sao" (chef to the stars) in recognition of his background as private caterer for numerous Hollywood celebrities in the United States, which by association has advanced his public profile in Vietnam.  At the height of his career while based in America, he was the executive chef of Baroness Kimberly Moore's "Echelon Club", a charitable lifestyle organization for high-profile individuals in Hollywood, and banquet chef at the Hotel Bel-Air.  He has featured on a number of television series both in Vietnam and the United States, including "Rachael vs. Guy: Kids Cook-Off";, "Cutthroat Kitchen", "Food of the Stars" and "Food Paradise".  He is currently appearing as a judge on Junior MasterChef Vietnam as well as Vietnam’s version of "My Mom Cooks Better Than Yours" on state-owned channel VTV3 and is also filming for the "Asian Food Channel".  He has been promoting Netspace Culinary Academy in Vietnam with celebrity chef Anna Olson, and is a goodwill ambassador for the culinary charity K.O.T.O. (teaching employable food industry skills to Vietnamese street children).

Chef (South Park): Jerome "Chef" McElroy is a cartoon character on the Comedy Central series "South Park" who was voiced by soul singer Isaac Hayes.  A cafeteria worker (as his nickname implies) at the local elementary school in the town of South Park, Colorado, Chef is generally portrayed as more level-headed than the other adult residents of the town, and sympathetic to the kids.  His guidance is often sought by the show's core group of child protagonists – Eric Cartman, Stan Marsh, Kyle Broflovski, and Kenny McCormick – as he is usually the only adult whom they consistently trusted.  To an inadvertent fault, he frequently gives inappropriate advice, usually in the non sequitur form of a lascivious soul song.

Cartman's Mom Is Still a Dirty Slut: "Cartman's Mom Is Still a Dirty Slut" is the second episode in the second season of the American animated television series "South Park".  The 15th episode of the series overall, it premiered on Comedy Central in the United States on April 22, 1998.  The episode concludes the storyline of the season one finale "Cartman's Mom Is a Dirty Slut"; Mephesto is suddenly shot, just as he is about to reveal the identity of Cartman's father.  The four boys and Chef rush him to Hell's Pass Hospital while the town of South Park experiences a massive blizzard.

Cartman's Incredible Gift: "Cartman's Incredible Gift" is episode 124 of the Comedy Central series "South Park".  It originally aired December 8, 2004 as part of the series' eighth season.  In the episode, local police become convinced that Eric Cartman has psychic abilities, which Cartman exploits for personal gain, much to the ire of Kyle Broflovski, other psychic detectives, and the true serial killer behind a series of murders that Cartman falsely attributes to others.

Cartman's Mom Is a Dirty Slut: "Cartman's Mom Is a Dirty Slut" is the first season finale of the American animated television series "South Park".  It originally aired on Comedy Central in the United States on February 25, 1998.  The episode is the highest viewed episode in the entire "South Park" series, with 6.4 million views.  It is part one of a two-episode story arc, which concluded with "Cartman's Mom Is Still a Dirty Slut".  The episode follows Eric Cartman, one of the show's child protagonists, becoming curious about the identity of his father.  He discovers that his father is most likely a man his mother had sexual intercourse with during an annual party called "The Drunken Barn Dance".  Meanwhile, his friends Stan, Kyle and Kenny participate on "America's Stupidest Home Videos", after filming Cartman playing in his yard with plush toys.

Eric Cartman: Eric Theodore Cartman, often referred to as just Cartman, is a main character in the animated television series "South Park", created by Matt Stone and Trey Parker, and voiced by Trey Parker.  Cartman, generally referred to by his surname, is one of four central characters in "South Park", along with his friends Stan Marsh, Kyle Broflovski, and Kenny McCormick.  Cartman first appeared, originally named Kenny, in prototypical form in a 1992 animated short "Jesus vs. Frosty", and a 1995 animated short "Jesus vs. Santa", and first appeared on television in the pilot episode of "South Park", "Cartman Gets an Anal Probe", on August 13, 1997.

The Biggest Douche in the Universe: "The Biggest Douche in the Universe" is the 15th episode of the sixth season and the 94th overall episode of the Comedy Central animated series "South Park".  It was first broadcast on November 27, 2002 and was the last in a mini-arc depicting Cartman being occasionally possessed by Kenny.  The episode is centered on Liane Cartman and Chef attempting to exorcise Kenny's soul while Stan deals with trying to debunk self-proclaimed psychic John Edward, whom the entire crew of South Park Studios agreed to be "the biggest douche in the universe."  The episode is rated TV-MA in the United States, except on syndicated broadcasts, where the episode is rated TV-14, instead.

Slut: Slut is generally a term for a woman or girl who is considered to have loose sexual morals or who is sexually promiscuous.  It is usually used as an insult, sexual slur or offensive term of disparagement (slut shaming).  It originally meant "a dirty, slovenly woman", and is rarely used to refer to men, generally requiring clarification by use of the terms "male slut" or "man whore".

Starvin' Marvin (South Park): "Starvin' Marvin" is the eighth episode in the first season of the American animated television series "South Park".  It first aired on Comedy Central in the United States on November 19, 1997.  In the episode, Cartman, Kenny, Kyle and Stan send money to an African charity hoping to get a sports watch, but are instead sent an Ethiopian child whom they dub "Starvin' Marvin".  Later, Cartman is accidentally sent to Ethiopia, where he learns activist Sally Struthers is hoarding the charity's food for herself.  In an accompanying subplot, after genetically engineered turkeys attack South Park residents, Chef rallies the residents to fight back, in a parody of the film "Braveheart".

Dennis Gersten: Dennis Gersten American actor and director who helped create Stagewrights, Inc. in New York City, a playwrights' theatre company.  There, he wrote "Mine" and the one-acts "Rhetoric" and "Puppy Chow" and directed and performed in original works.  Gersten attended the graduate program in acting at California Institute of the Arts where he wrote "Willie Said To", a finalist with the LA Arts Council and other contests nationally and performed at Playwrights Arena and Unity Players; "Desert - Morning", performed at the Gene Dynarski Theatre; and "Dirty Slut".  Primarily an actor, Gersten performed with Linda Hamilton in the world premiere of "Worse Than Murder: Ethel and Julius Rosenberg" at the Ventura Court Theatre and the west coast premiere of "David and Goliath in America" with the Road Theatre Company, for which he received an ADA Award.  He is a founding member of Theatre Unlimited, where he was seen in "Shoe Man" and "Move Over, Mrs. Markham", and where he directed "The Author’s Thumb", his own adaptation of the works of Henry Fielding, for which Gersten received three ADA Awards, as a director, writer and producer.  He was also nominated for an LA Weekly Theater Award for his performance in "Dirk" at the Road Theatre.

Supporting paragraphs: Cartman's Mom Is Still a Dirty Slut Chef (South Park)
Answer: soul singer Isaac Hayes