Suggestions by @adamarmstrong

Jeff Ross

as Pain in Hercules

Clancy Brown

as Zeus in Hercules

Helena Bonham Carter

as Madame Giry in The Phantom of the Opera

Patrick Stewart

as Firmin Richard in The Phantom of the Opera

Kenneth Branagh

as Director in The Phantom of the Opera

Marie McLaughlin

as Carlotta (Singing Voice) in The Phantom of the Opera

Anna O'Byrne

as Christine Daaé (singing voice) in The Phantom of the Opera

Dominic Cooper

as Philippe, Comte de Chagny in The Phantom of the Opera

Vera Farmiga

as Carlotta in The Phantom of the Opera

Ryan Gosling

as Erik in The Phantom of the Opera

Rob Ashford

as Director in Sunset Boulevard (2020)

Ed Harris

as Cecil B. DeMille in Sunset Boulevard (2020)

Christine Ebersole

as Hedda Hopper in Sunset Boulevard (2020)

Curtis Holbrook

as Artie Green in Sunset Boulevard (2020)

Christy Altomare

as Betty Schaefer in Sunset Boulevard (2020)

Kelsey Grammer

as Max Von Mayerling in Sunset Boulevard (2020)

Jason Isaacs

as Frollo in The Hunchback of Notre Dame