Suggestions by @b18

Bella Heathcote

as Aphrodite in Percy Jackson and the Olympians

Score: +1

Nell Tiger Free

as Silena Beauregard in Percy Jackson and the Olympians

Score: -3

Amandla Stenberg

as Sarella Sand in A Song of Ice and Fire

Score: -1

Evan Peters

as Kile woodwork in The Selection Series

Score: -12

Amber Heard

as Queen Amberly in The Selection Series

Score: -35

Saoirse Ronan

as Polaris in Marvel Cinematic Universe

Score: +1

Mark Addy

as Doctor Joseph Wanless in Firestarter

Score: -1

Michael Shannon

as Irv Manders in Firestarter

Score: +2

Rory McCann

as John Rainbird in Firestarter

Score: 0

Julia Roberts

as Norma Manders in Firestarter

Score: +1

Ian McKellen

as Captain Hollister in Firestarter

Score: -1

Iwan Rheon

as Andrew 'Andy' McGee in Firestarter

Score: +1

Bonnie Wright

as Victoria 'Vicki' Tomlinson Mcgee in Firestarter

Score: +2

Dakota Fanning

as Charlene 'Charlie' McGee in Firestarter

Score: +1

Dylan Sprouse

as Joffrey Baratheon in ASOIAF

Score: 0

Johnny Depp

as Euron Greyjoy in ASOIAF

Score: +2

Marina Ruy Barbosa

as Ygritte in ASOIAF

Score: +6

Freddie Highmore

as Quentyn Martell in ASOIAF

Score: 0

Garrett Hedlund

as Brandon Stark in ASOIAF

Score: -3

Lucas Till

as Viserys Targaryen in ASOIAF

Score: -3