Suggestions by @brendancrowley

Dan Abnett

as Writer in Aquaman: Usurper (2017)

Score: +1

Drew Van Acker

as Tempest in Aquaman: Usurper (2017)

Score: +1

Emilia Clarke

as Mera in Aquaman: Usurper (2017)

Score: +1

Sarah Grey

as Dolphin in Aquaman: Usurper (2017)

Score: +1

Adam Driver

as Kadaver in Aquaman: Usurper (2017)

Score: +1

Jason Momoa

as Aquaman in Aquaman: Usurper (2017)

Score: +1

Dominic Sena

as Director in The Flash: Mean Streak (1994)

Score: +1

Annette Calud

as Linda Park in The Flash: Mean Streak (1994)

Score: +1

Alan Arkin

as Abra Kadabra in The Flash: Mean Streak (1994)

Score: +1

Michael Caine

as Mayor Lampert in The Flash: Mean Streak (1994)

Score: +1

Keanu Reeves

as Flash in The Flash: Mean Streak (1994)

Score: +1

Mel Gibson

as Chillblaine in The Flash: Mean Streak (1994)

Score: +1

Rob Lowe

as Rob in The Flash: Mean Streak (1994)

Score: +1

Pamela Anderson

as Allison Armitage in The Flash: Mean Streak (1994)

Score: +1

Mark Waid

as Writer in The Flash: Mean Streak (1994)

Score: +1

Charles Bronson

as Zeke in Batman: Scarecrow Comes to Town (1968)

Score: +1

William Dozier

as Producer in Batman: Scarecrow Comes to Town (1968)

Score: +1

Margaret Hamilton

as Martha Wayne in Batman: Scarecrow Comes to Town (1968)

Score: +3

Stafford Repp

as Chief O'Hara in Batman: Scarecrow Comes to Town (1968)

Score: +3

Donald Pleasence

as Dr. Hugo in Batman: Scarecrow Comes to Town (1968)

Score: +4