Suggestions by @ineffablejew

Helen Mcrory

as Narcissa Malfoy in The Potion Master's Grace

Score: +2

Harry Lloyd

as Lucius Malfoy (young) in The Potion Master's Grace

Score: +1

Jamie Campbell Bower

as Xenophilius Lovegood (young) in The Potion Master's Grace

Score: +2

Rhys Ifans

as Xenophilius Lovegood in The Potion Master's Grace

Score: +1

KiKi Layne

as Dorcas Meadowes in The Potion Master's Grace

Score: 0

Harry Lloyd

as Xenophilius Lovegood (young) in The Potion Master's Grace

Score: +1

Aaron Taylor-Johnson

as James Potter in The Potion Master's Grace

Score: -1

Dev Patel

as James Potter in The Potion Master's Grace

Score: +1

Jason Isaacs

as Lucius Malfoy in The Potion Master's Grace

Score: +1

Katie McGrath

as Bellatrix Black (young) in The Potion Master's Grace

Score: +1

Natalie Dormer

as Narcissa Black (young) in The Potion Master's Grace

Score: +1

Jim Sturgess

as Frank Longbottom in The Potion Master's Grace

Score: +1

Eliza Scanlen

as Lily Evans in The Potion Master's Grace

Score: +1

Sophie Skelton

as Lily Evans in The Potion Master's Grace

Score: +1

Matthias Schoenaerts

as Evan Maes in The Potion Master's Grace

Score: +1

Daniel Brühl

as Evan Maes in The Potion Master's Grace

Score: +1

Rupert Grint

as Ron Weasley in The Potion Master's Grace

Score: +1

James McAvoy

as Ted Tonks in The Potion Master's Grace

Score: +1

Keira Knightley

as Andromeda Tonks in The Potion Master's Grace

Score: +1

Ben Barnes

as Sirius Black in The Potion Master's Grace

Score: +1