* Eric Cartman: The infamous, arrogant, and often cruel character.
* Randy Marsh: Stan's father, who is known for his unpredictable behavior and love for marijuana.
* Mr. Mackey: The school counselor with his iconic "m'kay" catchphrase.
* Chef: The former chef at South Park Elementary (though he is no longer alive on the show).
Stan's voice is actually provided by Trey Stone, not Trey Parker. The two co-creators of South Park often share roles on the show, so it can be confusing to keep track. But remember, Trey Stone is the voice behind Stan, while Trey Parker voices Cartman, Randy, Mr. Mackey, and Chef.