Suggestions by @mike1seravello

Thinner (Film, 1996)

as John Candy in Roles That Actors / Actresses Were ALMOST Casted

Hale Caesar (Expendables)

as Wesley Snipes in Roles That Actors / Actresses Were ALMOST Casted

Star Trek: First Contact

as Yaphet Kotto in Roles That Actors / Actresses Were ALMOST Casted

Jean-Luc Picard

as Yaphet Kotto in Roles That Actors / Actresses Were ALMOST Casted

Yar (Dinosaur)

as Forest Whitaker in Roles That Actors / Actresses Were ALMOST Casted

Hale Caesar (Expendables)

as Forest Whitaker in Roles That Actors / Actresses Were ALMOST Casted

Monty Python and the Holy Grail

as Brian Blessed in Roles That Actors / Actresses Were ALMOST Casted

Denethor

as John Rhys-Davies in Roles That Actors / Actresses Were ALMOST Casted

The Irishman

as Ray Liotta in Roles That Actors / Actresses Were ALMOST Casted

James Munroe

as Ray Liotta in Roles That Actors / Actresses Were ALMOST Casted

Vampires (1998 movie)

as R. Lee Ermey in Roles That Actors / Actresses Were ALMOST Casted

21 Jump Street

as J.K Simmons in Roles That Actors / Actresses Were ALMOST Casted

The Secret Life of Walter Mitty

as Mike Myers in Roles That Actors / Actresses Were ALMOST Casted

Pepé Le Pew

as Mike Myers in Roles That Actors / Actresses Were ALMOST Casted

Confessions of a Dangerous Mind

as Mike Myers in Roles That Actors / Actresses Were ALMOST Casted

Luca The Octopus (Shark Tale)

as Christopher Walken in Roles That Actors / Actresses Were ALMOST Casted

The 6th Day

as Jack Nicholson in Roles That Actors / Actresses Were ALMOST Casted

Willy Wonka (Johnny Depp)

as Jack Nicholson in Roles That Actors / Actresses Were ALMOST Casted

Ready Player One (film)

as Jack Nicholson in Roles That Actors / Actresses Were ALMOST Casted

A Christmas Story

as Jack Nicholson in Roles That Actors / Actresses Were ALMOST Casted