Suggestions by @darke

Stefan Kapičić

as Anatoli Knyazev in Green Arrow

Karl Urban

as Constantine Drakon in Green Arrow

Roy Harper

as "The Student" in Green Arrow

Spoiler

as "The Student" in Green Arrow

Aaron Taylor-Johnson

as "The Friend" in Green Arrow

Hal Jordan

as "The Friend" in Green Arrow

Spoiler

as "The Friend" in Green Arrow

David Castañeda

as Floyd Lawton in Green Arrow

Isaiah Mustafa

as Simon Lacroix in Green Arrow

Rufus Sewell

as David Cain in Green Arrow

Ghassan Massoud

as Ra's al Ghul in Green Arrow

Timothy Dalton

as Robert Queen in Green Arrow

Inbar Lavi

as Talia al Ghul in Green Arrow

Alexander Siddig

as R'as al Ghul in Green Arrow

Timothy Olyphant

as Slade Wilson in Green Arrow

Katheryn Winnick

as Dinah Laurel Lance in Green Arrow

Ryan Gosling

as Oliver Queen in Green Arrow

Pawel Pogorzelski

as Cinematographer in Arkham Asylum: Silence of the Sick

Mike Flanagan

as Director in Arkham Asylum: Silence of the Sick

Jasper Pääkkönen

as The Barbaric in Arkham Asylum: Silence of the Sick