The creators of South Park, Trey Parker and Matt Stone, are known for their versatile voice acting skills, and they voice many of the characters on the show. However, they do not voice all of the characters.
In the early seasons of the show, Parker and Stone voiced the majority of the characters, including the main characters Stan, Kyle, Cartman, and Kenny, as well as many of the recurring characters. They also voiced one-off characters as needed.
As the show has continued, more voice actors have been added to the cast. However, Parker and Stone still voice many of the main characters, including Cartman, Kyle’s little brother Ike, and the school counselor Mr. Mackey. They also continue to voice many of the one-off characters.
Other notable voice actors on the show include Mona Marshall and Eliza Schneider, who voice the majority of the female characters. They also voice some of the male characters, including Wendy’s boyfriend Token and Chef’s father.
Isaac Hayes, who played Chef on the show, also contributed his own voice to the character. After Hayes left the show, his character was retired.
In later seasons, the show has also featured guest voice actors, including celebrities such as Robert Smith of The Cure, Kanye West, and Jennifer Aniston. These guest actors typically voice one-off characters.
Overall, while Parker and Stone do not voice all of the characters on the show, they remain a significant presence in the cast, and their voice acting skills are an important part of the show’s appeal.