Suggestions by @pyrosnickenson

John David Washington

as John Stewart in Green Lantern

Score: +1

Luke Evans

as Sinestro in Green Lantern

Score: +1

Matt Lanter

as Green Lantern in Green Lantern

Score: +1

Alden Ehrenreich

as Green Lantern in Green Lantern

Score: +1

Nate Mooney

as Rudolph Jones in DCSV’s Superman

Score: +1

Taron Egerton

as Steve Lombard in DCSV’s Superman

Score: +1

Penn Badgley

as Scott Free in DCSV’s New Gods

Score: +1

Sophia Lillis

as Winnie Schott in DCSV’s Superman

Score: +1

Isabel May

as Kara Zor-El in DCSV’s Superman

Score: +1

Danny Pudi

as Edward Nashton in DCU (Gunnverse)

Score: 0

Igor Grabuzov

as Werner Zytle in DCU (Gunnverse)

Score: +1

Jim O'Heir

as Perry White in DCU (Gunnverse)

Score: +2

Karen Gillan

as Artemis of Bana-Mighdall in Paradise Lost

Score: -2

Mark Hamill

as Clubs in The Mistborn Trilogy

Score: +1

Glenn Howerton

as Joker in Gunn's DCU

Score: +1

Wilson Bethel

as Reverse Flash in Gunn's DCU

Score: 0

Sean Giambrone

as Jimmy Olsen in Gunn's DCU

Score: +1

Lily James

as Iris West in Flash (DCU)

Score: +1

Jamie Chung

as Golden Glider in Flash (DCU)

Score: -1

John Cho

as Captain Cold in Flash (DCU)

Score: 0