Suggestions by @lautakin

Samantha Cormier

as Bloom in Winx Club- live action

Score: +1

Meg Donnelly

as Stella in Winx Club- live action

Score: 0

Aya Furukawa

as Musa in Winx Club- live action

Score: 0

Edgar Ramírez

as Poseidon in Percy Jackson & the Olympians

Score: +1

Darby Camp

as Rachel Elizabeth Dare in Percy Jackson & the Olympians

Score: +2

Julian Edwards

as Nico di Angelo in Percy Jackson & the Olympians

Score: +1

Jack O'Connell

as The Bloody Baron in Hogwarts Founders

Score: +1

Jerome Flynn

as Nearly Headless Nick in Hogwarts Founders

Score: 0

Peter Kay

as The Fat Friar in Hogwarts Founders

Score: +1

Thaddea Graham

as The Grey Lady in Hogwarts Founders

Score: +2

Peter Kay

as Nearly Headless Nick in Hogwarts Founders

Score: +1

Nicola Coughlan

as Helga Hufflepuff in Hogwarts Founders

Score: +1

Gemma Chan

as Rowena Ravenclaw in Hogwarts Founders

Score: 0

Tom Hiddleston

as Salazar Slytherin in Hogwarts Founders

Score: +4

Dev Patel

as Godric Gryffindor in Hogwarts Founders

Score: +1

Chad Michael Murray

as King Clarkson in The Selection

Score: +1

Galadriel Stineman

as Kenna Singer in The Selection

Score: +1

Lucas Lynggaard Tønnesen

as Prince Henry in Red, White & Royal Blue

Score: 0

Gillian Anderson

as President Ellen Claremont in Red, White & Royal Blue

Score: -1

Manish Dayal

as Shaan Srivavastava in Red, White & Royal Blue

Score: +1