Suggestions by @dogorelli

Idris Elba

as John Stewart in DCU (Gunnverse)

Score: +1

Alfred Enoch

as John Stewart in DCU (Gunnverse)

Score: +1

Joivan Wade

as John Stewart in DCU (Gunnverse)

Score: +1

Daniel Kaluuya

as John Stewart in DCU (Gunnverse)

Score: +1

Yahya Abdul-Mateen II

as John Stewart in DCU (Gunnverse)

Score: +1

LaKeith Stanfield

as John Stewart in DCU (Gunnverse)

Score: +1

Sasha Calle

as Zatanna Zatara in DCU (Gunnverse)

Score: 0

Kelly McDonald

as Carol Ferris in DCU (Gunnverse)

Score: +1

Demi Moore

as Carol Ferris in DCU (Gunnverse)

Score: +2

Sam Corlett

as Orion in DCU (Gunnverse)

Score: +3

Sam Corlett

as Jonathan Crane in DCU (Gunnverse)

Score: +1

Sam Corlett

as Scott Free in DCU (Gunnverse)

Score: +1

Sam Corlett

as John Corben in DCU (Gunnverse)

Score: +1

Sam Corlett

as Roy Harper in DCU (Gunnverse)

Score: +1

Sam Corlett

as Krem of the Yellow Hills in DCU (Gunnverse)

Score: +1

Sam Corlett

as Eobard Thawne in DCU (Gunnverse)

Score: +1

Sam Corlett

as Malcom Merlyn in DCU (Gunnverse)

Score: +1

Sam Corlett

as Barry Allen in DCU (Gunnverse)

Score: +1

Sam Corlett

as Oliver Queen in DCU (Gunnverse)

Score: +1

Jamie Campbell Bower

as M'comm M'orzz in DCU (Gunnverse)

Score: +1