Suggestions by @guilhermecustodio

Glen Powell

as Booster Gold in Justice League International

Score: +1

Alexander Skarsgård

as Green Arrow in Justice League International

Score: +1

Sofia Boutella

as Wonder Woman in Justice League International

Score: +1

Theo James

as Batman in Justice League International

Score: +1

Daniel Kwan and Daniel Scheinert

as Director in Flash: The Fastest Man Alive

Score: +2

Daniel Kwan

as Director in Flash: The Fastest Man Alive

Score: -1

Morena Baccarin

as Nora Allen in Flash: The Fastest Man Alive

Score: +1

Jamie Parker

as Henry Allen in Flash: The Fastest Man Alive

Score: +1

Jeff Bennett

as Turtle in Flash: The Fastest Man Alive

Score: +1

Keivonn Woodard

as Wallace West in Flash: The Fastest Man Alive

Score: +1

Iain Armitage

as Wally West in Flash: The Fastest Man Alive

Score: +2

Tom Goodman-Hill

as Distópico Future Flash in Flash: The Fastest Man Alive

Score: +1

Danielle Rose Russell

as Iris West in Flash: The Fastest Man Alive

Score: +1

George MacKay

as Flash in Flash: The Fastest Man Alive

Score: +1

Matthew Vaughn

as Writer in Black Canary and Green Arrow

Score: +2

Hagai Levi

as Director in Black Canary and Green Arrow

Score: +1

Elena Erbakova

as Taiana in Black Canary and Green Arrow

Score: +1

RC Everbeck

as Hackett in Black Canary and Green Arrow

Score: +1

Tao Okamoto

as Chien na Wei in Black Canary and Green Arrow

Score: +1

Amanda Seyfried

as Black Cannary (First One, Deceased, Appear in a 90's Flashback) in Black Canary and Green Arrow

Score: +1