Suggestions by @dippy2

Charlie Cox

as The Question in The Question: Born Again

Score: +1

Olga Kurylenko

as Prometheus in Black Canary

Score: +1

David Harbour

as KGBeast in Black Canary

Score: +1

Florence Pugh

as Sin Lance in Black Canary

Score: +1

Scarlett Johansson

as Black Canary in Black Canary

Score: +1

Cliff Robertson

as Henry Allen in Flash 2

Score: +1

Alfred Molina

as Gorilla Grodd in Flash 2

Score: +1

James Franco

as Hunter Zolomon in Flash 2

Score: +1

Kirsten Dunst

as Iris West in Flash 2

Score: +1

Scott Speedman

as Flash in Flash 2

Score: +1

Cliff Robertson

as Henry Allen in Flash

Score: +1

James Franco

as Hunter Zolomon in Flash

Score: +1

Sam Raimi

as Director in Flash

Score: +1

Kirsten Dunst

as Iris West in Flash

Score: +1

Willem Dafoe

as Reverse Flash in Flash

Score: +1

Scott Speedman

as Flash in Flash

Score: 0

Lewis Pullman

as David Mazouz in Batman: Injustice

Score: +1

Giancarlo Esposito

as Wade Eiling in Batman 4: The Brave Knight

Score: +1

Liv Tyler

as Mera in Batman 4: The Brave Knight

Score: +1

Harrison Ford

as President Sam Lane in Batman 4: The Brave Knight

Score: +1