Suggestions by @aaronpirelatinedo

Doc Hammer

as Dr. Girlfriend in The Venture Bros

Paul Rudd

as The Monarch in The Venture Bros

Paul Rugg

as The Monarch in The Venture Bros

Asher Angel

as Hank Venture in The Venture Bros

Owen Vaccaro

as Dean Venture in The Venture Bros

John Cena

as Brock Sampson in The Venture Bros

Bill Hader

as Dr. Thaddeus Venture in The Venture Bros

Ti West

as Director in Hazbin Hotel

The Venture Bros.

as Next Project in Hazbin Hotel

Zendaya

as I.M.P. in Hazbin Hotel

Loona (Helluva Boss)

as I.M.P. in Hazbin Hotel

Mia Goth

as I.M.P. in Hazbin Hotel

Millie (Helluva Boss)

as I.M.P. in Hazbin Hotel

Jack Quaid

as I.M.P. in Hazbin Hotel

Moxxie (Helluva Boss)

as I.M.P. in Hazbin Hotel

Brandon Rogers

as I.M.P. in Hazbin Hotel

Blitzo (Helluva Boss)

as I.M.P. in Hazbin Hotel

Spoiler

as I.M.P. in Hazbin Hotel

Luke Evans

as The Vees in Hazbin Hotel

Valentino (Hazbin Hotel)

as The Vees in Hazbin Hotel