Suggestions by @cameroniacobucci

Adewale Akinnuoye-Agbaje

as Tombstone in Characters who have not appeared, but should appear, in the MCU

Score: +2

Sterling K. Brown

as Hobie Brown in Characters who have not appeared, but should appear, in the MCU

Score: +1

Cameron Monaghan

as Roderick Kingsley in Characters who have not appeared, but should appear, in the MCU

Score: +1

Jim Carrey

as Dr. Robotnik in Illumination's Sonic the Hedgehog

Score: 0

Jon Hamm

as Two-Face in The Batman shared universe

Score: +1

Tara Strong

as Twilight Sparkle in The Mash Toons

Score: +1

Mark Hamill

as Skips in The Mash Toons

Score: +1

Kathy Najimy

as Mary Sanderson in Hocus pocus and the all-new sequel

Score: +1

Bette Midler

as Winifred Sanderson in Hocus pocus and the all-new sequel

Score: +1

Sarah Jessica Parker

as Sarah Sanderson in Hocus pocus and the all-new sequel

Score: +48

Michael Keaton

as Batman in Batman The Dark Knight (1998)

Score: +1

Tara Strong

as Olga in Nerd and Jock (animated Netflix series)

Score: +1

Tara Strong

as Tiger in Nerd and Jock (animated Netflix series)

Score: +1

Grey DeLisle

as Tiger in Nerd and Jock (animated Netflix series)

Score: +1

J.G. Quintel

as Mordecai in The Mash Toons

Score: +1

Jeremy Shada

as Finn the Human in The Mash Toons

Score: +1

Jeremy Shada

as Finn the Human in The Mash Toons

Score: +1

Kristen Schaal

as Mabel Pines in The Mash Toons

Score: +1

Jason Ritter

as Dipper Pines in The Mash Toons

Score: +1