Suggestions by @liquidcarlton

Wayne Knight

as Stain in MAH Hero Academ

Conan O'Brien

as Mei Hatsume in MAH Hero Academ

Dave Bautista

as Endeavor in MAH Hero Academ

Jeff Goldblum & Lou Ferrigno

as Midnight in MAH Hero Academ

Alan Rickman

as Eraser Head in MAH Hero Academ

Toru (JoJo's Bizarre Adventure)

as Toru in MAH Hero Academ

Robin Williams

as Tokoyami in MAH Hero Academ

Tim Allen

as Hanta Sero in MAH Hero Academ

Zack Snyder

as Kyoka Jiro in MAH Hero Academ

Alexander Skarsgård

as Shoji in MAH Hero Academ

Mr. Popo

as Rikido in MAH Hero Academ

Koji Kondo

as Koji Konda in MAH Hero Academ

Henry Cavill

as Eijiro in MAH Hero Academ

Jim Carrey

as All Mighty then in MAH Hero Academ

Billy Herrington

as All Might in MAH Hero Academ

Jaleel White

as Denki in MAH Hero Academ

Michael Jai White

as Denki in MAH Hero Academ

The People v. O. J. Simpson: American Crime Story

as Ojiro in MAH Hero Academ

Micheal Cera

as Tenya Ida in MAH Hero Academ

kermitthefrogguy

as Tsuyu in MAH Hero Academ