Suggestions by @greenarrows

Adria Arjona

as Jessica Viviana Cruz in Justice League

Score: +1

Gwendoline Christie

as Big Barda in Justice League

Score: +1

Drew Starkey

as Firestorm in Justice League

Score: +1

Nicole Maines

as Dreamer in Justice League

Score: +1

John Cena

as Peacemaker in The Suicide Squad

Score: +1

Freddie Stroma

as The Vigilante in Justice League

Score: +1

Bradley Cooper

as Vigilante in Justice League

Score: -1

Charlie Hunnam

as Shining Knight in Justice League

Score: +1

Ayo Edebiri

as Crimson Avenger in Justice League

Score: +1

Luke Wilson

as S.T.R.I.P.E. in Justice League

Score: +1

Mason Thames

as Star-Spangled Kid in Justice League

Score: +1

Shayne Topp

as Booster Gold in Justice League

Score: +1

Cameron Monaghan

as Elongated Man in Justice League

Score: +1

Isabela Merced

as Hawkgirl in Justice League

Score: +1

Sophie Turner

as Katherine Manser in All-Star Western: Jonah Hex

Score: -1

Jack Champion

as The Flash/Kid Flash in Young Justice

Score: +1

Meg Donnelly

as Arrowette in Young Justice

Score: +1

Walker Scobell

as Impulse in Young Justice

Score: +1

Laura Kariuki

as Starfire in Young Justice

Score: +1

Wilson Radjou-Pujalte

as Cyborg in Young Justice

Score: +1