Suggestions by @casstherose

Joseph Mawle

as Ned Stark in ASOIAF

Score: +2

Nicole Kidman

as Cersei Lannister in A Song of Ice & Fire

Score: -1

Kat Graham

as Arianne Martell in ASOIAF

Score: +1

Sarah Shahi

as Arianne Martell in ASOIAF

Score: -1

Emeraude Toubia

as Arianne Martell in ASOIAF

Score: -1

Wolfgang Novogratz

as Renly Baratheon in ASOIAF

Score: +1

Joland Novaj

as Loras Tyrell in ASOIAF

Score: -1

Matthew Clavane

as Satin Flowers in ASOIAF

Score: +2

Miranda Otto

as Catelyn Tully Stark in ASOIAF

Score: 0

Elijah O'Sullivan

as Bran Stark in ASOIAF

Score: +1

Ben Barnes

as Theon Greyjoy in ASOIAF

Score: -2

Alia Bhatt

as Elia Martell in ASOIAF

Score: +1

Ryusei Yokohama

as Theon Greyjoy in ASOIAF

Score: 0

Michelle Pfeiffer

as Olenna Tyrell in ASOIAF

Score: +1

Matthew Clavane

as Loras Tyrell in ASOIAF

Score: +1

Michal Mrázik

as Jon Snow in ASOIAF

Score: +2

Nikolaj Coster-Waldau

as Jaime Lannister in ASOIAF

Score: +1

Adelaide Kane

as Lyanna Stark in ASOIAF

Score: +1

Willy Cartier

as Jon Snow in ASOIAF

Score: 0

Miles McMillan

as Jon Snow in ASOIAF

Score: +1