Suggestions by @visno

Sebastian the Crab (The Little Mermaid)

as Disney Comic-Reliefs in Mount Rushmores

Phoenix (Jean Grey)

as Marvel Superheroes in Mount Rushmores

Charles Xavier

as Marvel Superheroes in Mount Rushmores

Charles F. Muntz

as Disney Villains in Mount Rushmores

Sid Phillips

as Disney Villains in Mount Rushmores

Hopper (A Bug's Life)

as Disney Villains in Mount Rushmores

Ernesto De la Cruz

as Disney Villains in Mount Rushmores

Stinky Pete (The Prospector)

as Disney Villains in Mount Rushmores

Lotso (Lots-o'-Huggin' Bear)

as Disney Villains in Mount Rushmores

Syndrome (Buddy Pine)

as Disney Villains in Mount Rushmores

Randall Boggs

as Disney Villains in Mount Rushmores

Madam Mim

as Disney Villains in Mount Rushmores

Shere Khan

as Disney Villains in Mount Rushmores

King Candy (Turbo)

as Disney Villains in Mount Rushmores

Clayton

as Disney Villains in Mount Rushmores

Lady Tremaine

as Disney Villains in Mount Rushmores

Shan Yu

as Disney Villains in Mount Rushmores

Mother Gothel

as Disney Villains in Mount Rushmores

Gaston LeGume

as Disney Villains in Mount Rushmores

Oscar the Grouch

as Muppets in Mount Rushmores