Suggestions by @christopherkrondon

Devil Artemis

as Perfect Cell in Dragon Ball Cinematic Universe

Akira Toriyama

as Director in Dragon Ball Cinematic Universe

Kimiko Glenn

as Hagakure in MHA-My Hero Academia

Morgan Freeman

as Grand Elder Guru in Dragon Ball (An Live Action Netflix Series)

Idris Elba

as Piccolo in Dragon Ball (An Live Action Netflix Series)

Ryan Renolds

as Yamcha in Dragon Ball (An Live Action Netflix Series)

Vin Diesel

as Tien in Dragon Ball (An Live Action Netflix Series)

No Voice Actor

as Teardrop in Battle For Dream Island (BFDI): The Movie

Maya Rudolph

as Toriel in UNDERTALE - THE MOVIE - a "harry potter-ish" fantasy movie

Adam Katz

as Nickel in Battle For Dream Island (BFDI): The Movie

Tom Holland

as Tennis Ball in Battle For Dream Island (BFDI): The Movie

Ross Lynch

as Denki Kaminari in My Hero Academia (Live Action)

Melissa McCarthy

as Flower(BFDI) in Battle For Dream Island, but with TALENTED actors

Ryan Reynolds

as Marx in Kirby: The Animated Movie