Suggestions by @lavender58

Alexandra Shipp

as Mary MacDonald in The Marauders(story private)

Score: -1

Annalise Basso

as Lily Evans in The Marauders(story private)

Score: -1

Samantha Cormier

as Lily Evans in The Marauders(story private)

Score: +1

Lucy Boynton

as Lily Evans in The Marauders(story private)

Score: -1

Danielle Rose Russell

as Lily Evans in The Marauders(story private)

Score: -1

Sophie Skelton

as Lily Evans in The Marauders(story private)

Score: -1

Saoirse Ronan

as Poppy Pomfrey in The Marauders(story private)

Score: -1

Katherine Waterston

as Walburga Black in The Marauders(story private)

Score: +1

Dev Patel

as James Fleamont Potter in The Marauders(story private)

Score: -1

Avan Jogia

as James Fleamont Potter in The Marauders(story private)

Score: -1

Reiky de Valk

as James Fleamont Potter in The Marauders(story private)

Score: -1

Tom Hiddleston

as Cygnus Black in The Marauders(story private)

Score: +1

Domhnall Gleeson

as Arthur Weasley in The Marauders(story private)

Score: +1

Arthur Darvill

as Arthur Weasley in The Marauders(story private)

Score: -1

Crystal Reed

as Amelia Bones in The Marauders(story private)

Score: +1

Julia Roberts

as Euphemia Potter in The Marauders(story private)

Score: +1

John Boyega

as Kingsley Shackelbolt in The Marauders(story private)

Score: +1

Oscar Isaac

as Fleamont Potter in The Marauders(story private)

Score: +1

Tom Hiddleston

as Orion Black in The Marauders(story private)

Score: +1

Colin Firth

as Orion Black in The Marauders(story private)

Score: +1