Suggestions by @user_107872

Natascha McElhone

as Minerva McGonagall in Harry Potter (story private)

Score: -1

Colin Morgan

as Morphin Gaunt in Harry Potter (story private)

Score: +1

Mark Lewis Jones

as the Fat Friar in Harry Potter (story private)

Score: +1

Anna Chancellor

as Ms. Grubbly-Plank in Harry Potter (story private)

Score: +1

Matthew Goode

as Voldemort in Harry Potter (story private)

Score: -1

Matthew Goode

as Quirinius Quirrell in Harry Potter (story private)

Score: -1

Ed Stoppard

as Marvolo Gaunt in Harry Potter (story private)

Score: +1

Caroline Goodall

as Ms. Grubbly-Plank in Harry Potter (story private)

Score: +1

Michael Culkin

as Tom in Harry Potter (story private)

Score: +1

Luther Ford

as Bill Weasley in Harry Potter (story private)

Score: +1

Amelia Bullmore

as Mrs Crouch in Harry Potter (story private)

Score: +1

Lia Williams

as Mrs Crouch in Harry Potter (story private)

Score: +1

Sharon Duncan-Brewster

as Hestia Jones in Harry Potter (story private)

Score: +1

Gemma Chan

as Emmeline Vance in Harry Potter (story private)

Score: +1

Nabhaan Rizwan

as Sturgis Podmore in Harry Potter (story private)

Score: +1

Tom Hardy

as Fenrir Greyback in Harry Potter (story private)

Score: -1

Éanna Hardwicke

as Barthy Crouch Junior in Harry Potter (story private)

Score: +1

Kate Dickie

as Ms Cole in Harry Potter (story private)

Score: +1

Rufus Sewell

as Rufus Scrimgeour in Harry Potter (story private)

Score: -1

Burn Gorman

as Barthy Crouch Senior in Harry Potter (story private)

Score: +1