Suggestions by @devlinclements

Melvin Sneedly

as Aaron Paul in Roles That Actors / Actresses Were ALMOST Casted

Professor Pee-Pee Diarrheastein Poopypants Esq. (Tippy Tinkletrousers)

as Will Forte in Roles That Actors / Actresses Were ALMOST Casted

Harold Hutchins

as Chris Evans in Roles That Actors / Actresses Were ALMOST Casted

Vorb (We're Back!)

as Adam West in Roles That Actors / Actresses Were ALMOST Casted

Professor Screweyes

as Gene Hackman in Roles That Actors / Actresses Were ALMOST Casted

Rex (We're Back)

as Bill Murray in Roles That Actors / Actresses Were ALMOST Casted

Thunderbolt (The Wild Robot)

as Keith David in Roles That Actors / Actresses Were ALMOST Casted

Vontra (The Wild Robot)

as Gal Gadot in Roles That Actors / Actresses Were ALMOST Casted

Roz (The Wild Robot)

as Stephanie Beatriz in Roles That Actors / Actresses Were ALMOST Casted

Katie (Secret Life Of Pets)

as Alison Brie in Roles That Actors / Actresses Were ALMOST Casted

Katie Porter

as Alison Brie in Roles That Actors / Actresses Were ALMOST Casted

Pops (The Secret Life of Pets)

as James Woods in Roles That Actors / Actresses Were ALMOST Casted

Buddy (The Secret Life of Pets)

as Brian Tyree Henry in Roles That Actors / Actresses Were ALMOST Casted

Mrs. Potts

as Helen Mirren in Roles That Actors / Actresses Were ALMOST Casted

Cogsworth

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

Lumiere (2017)

as David Warner in Roles That Actors / Actresses Were ALMOST Casted

Belle (Beauty and the Beast)

as Kathleen Turner in Roles That Actors / Actresses Were ALMOST Casted

Air Conditioner

as Rik Mayall in Roles That Actors / Actresses Were ALMOST Casted

Radio

as Martin Short in Roles That Actors / Actresses Were ALMOST Casted

Lampy

as Don Knotts in Roles That Actors / Actresses Were ALMOST Casted