Suggestions by @devlinclements

Rameses

as Richard E. Grant in Roles That Actors / Actresses Were ALMOST Casted

Moses (The Prince of Egypt)

as Judd Nelson in Roles That Actors / Actresses Were ALMOST Casted

Sullivan (The Secret of NIMH)

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

Justin (The Secret of NIMH)

as Danny DeVito in Roles That Actors / Actresses Were ALMOST Casted

Nicodemus

as Laurence Olivier in Roles That Actors / Actresses Were ALMOST Casted

Steele (Balto)

as Alec Baldwin in Roles That Actors / Actresses Were ALMOST Casted

Balto (Character)

as Crispin Glover in Roles That Actors / Actresses Were ALMOST Casted

Ms. Flint (Monsters, Inc.)

as Kathy Najimy in Roles That Actors / Actresses Were ALMOST Casted

Celia Mae

as Courteney Cox in Roles That Actors / Actresses Were ALMOST Casted

Randall Boggs

as Dennis Leary in Roles That Actors / Actresses Were ALMOST Casted

Mike Wazowski

as Jason Alexander in Roles That Actors / Actresses Were ALMOST Casted

Bruton (Dinosaur)

as Dean Cain in Roles That Actors / Actresses Were ALMOST Casted

Zini (Dinosaur)

as Eddie Deezen in Roles That Actors / Actresses Were ALMOST Casted

Yar (Dinosaur)

as Leonard Nimoy in Roles That Actors / Actresses Were ALMOST Casted

Chip (Antz)

as Alan Rickman in Roles That Actors / Actresses Were ALMOST Casted

Azteca (ANTZ)

as Demi Moore in Roles That Actors / Actresses Were ALMOST Casted

Colonel Cutter

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

Weaver (ANTZ)

as Patrick Warburton in Roles That Actors / Actresses Were ALMOST Casted

Princess Bala

as Lisa Kudrow in Roles That Actors / Actresses Were ALMOST Casted

Z (Antz)

as Dustin Hoffman in Roles That Actors / Actresses Were ALMOST Casted