Suggestions by @emilyabbott060

Lucky Blue Smith

as Scorpius Malfoy in Next Generation

Score: +2

Luke Newberry

as Teddy Lupin in Next Generation

Score: +2

Ethan Cutkosky

as Hugo Granger-Weasley in Next Generation

Score: +14

Luca Hollestelle

as Rose Granger-Weasley in Next Generation

Score: +6

Elle Fanning

as Lily Luna Potter in Next Generation

Score: +1

Logan Lerman

as Albus Severus Potter in Next Generation

Score: +6

Dylan O'Brien

as James Sirius Potter in Next Generation

Score: +3

Pedro Pascal

as Fleamont Potter in The Marauders

Score: 0

Lara Pulver

as Euphemia Potter in The Marauders

Score: +2

Lily James

as Druella Black in The Marauders

Score: 0

Richard Madden

as Cygnus Black in The Marauders

Score: +2

Christian Bale

as Orion Black in The Marauders

Score: +1

Eva Green

as Walburga Black in The Marauders

Score: +2

Dominic Sherwood

as Augustus Rookwood in The Marauders

Score: +2

Charles Melton

as Avery II in The Marauders

Score: +1

Isabelle Fuhrman

as Hestia Jones in The Marauders

Score: +2

Troian Bellisario

as Amelia Bones in The Marauders

Score: 0

Tom Webb

as Edgar Bones in The Marauders

Score: +1

Juno Temple

as Pandora Lovegood in The Marauders

Score: +2

Jamie Campbell Bower

as Xenophilius Lovegood in The Marauders

Score: +3