Suggestions by @justice

Matt Ryan

as John Constantine in What if the DCEU started with Green Lantern and the Dark Knight Trilogy

Score: +3

Andy Samberg

as Booster Gold in What if the DCEU started with Green Lantern and the Dark Knight Trilogy

Score: 0

Danny Shepherd

as Dick Grayson in Justice League (New DCEU)

Score: +2

Tyler Hoechlin

as Clark Kent in Justice League (New DCEU)

Score: 0

Danny Shepherd

as Robin in Beast Boy

Score: 0

curren walters

as Red Hood in Every Batman Character

Score: -2

Danny Shepherd

as Nightwing in Every Batman Character

Score: -4

Walker Scobell

as Robin in The Batman

Score: -2

Oscar Isaac

as Moon Knight in Moon Knight And Blade

Score: +2

Miles Brown

as Miles Morales in Spider-Man College Years

Score: +1

Dane DeHaan

as Levi Ackerman in Birth of Levi

Score: +1

Noah Schnapp

as Armin in Attack on Titan

Score: +1

Dane DeHaan

as Captain Levi in Attack on Titan

Score: +1

Dane DeHaan

as Erwin Smith in Attack on Titan: Crimson Bow and Arrow

Score: +1

Dane DeHaan

as Levi Ackerman in Attack on Titan

Score: +2

Patrick Stewart

as Dot Pyxis in Attack on Titan

Score: +1

Noah Schnapp

as Armin Arlert in Attack on Titan

Score: +1

Noah Schnapp

as Superboy || in Young Justice

Score: -2

Grant Gustin

as Flash in Justice League : The Attack of Amazons

Score: +3