Suggestions by @erickborrego

Al Pacino

as Iron Man in Marvel vs DC (1990's)

Eugenio Derbez

as Mario Moreno in Mexican Biopics

Eduardo España

as El chompiras in Los Caquitos

Angelines Fernández

as Juno in Beetlejuice (1988 Alternate Cast)

Angelines Fernández

as Mary Poppins in Mary Poppins

Chespirito

as Mario Moreno in Mexican Biopics

Roberto Gómez Bolaños

as Writer in Chaves: O Filme (1978)

Chespirito

as Composer in Chaves: O Filme (1978)

Pelé

as Producer in Chaves: O Filme (1978)

Roberto Gómez Bolaños

as Director in Chaves: O Filme (1978)

Roberto Gómez Bolaños

as Composer in Roberto Gómez Bolaños' Deadpool (1986)

Chespirito

as Writer in Roberto Gómez Bolaños' Deadpool (1986)

Maggie Smith

as Untitled character (PORTRAYED BY SOFIA LOREN) in UNTITLED PARODY OF "THE EXPENDABLES"

Jim Carrey

as Untitled character (PORTRAYED BY HANK AZARIA) in UNTITLED PARODY OF "THE EXPENDABLES"