Suggestions by @tequilajoseph

Sian Brooke

as Narcissa Malfoy in Harry Potter: A TV Series (2009)

Score: +1

Iwan Rheon

as Severus Snape in Harry Potter: A TV Series (2009)

Score: 0

Milly Alcock

as Nymphadora Tonks in Harry Potter: A TV Series (2009)

Score: +1

Phia Saban

as Luna Lovegood in Harry Potter: A TV Series (2009)

Score: +2

Olivia Cooke

as Bellatrix Lestrange in Harry Potter: A TV Series (2009)

Score: +2

Emily Carey

as Hermione Granger in Harry Potter: A TV Series (2009)

Score: +1

Paddy Considine

as Lucius Malfoy in Harry Potter (HBO Max Series)

Score: -6

Iwan Rheon

as Professor Snape in Harry Potter (HBO Max Series)

Score: -22

Keira Knightley

as Argella Durrandon in Game Of Thrones: Aegon's Conquest

Score: +2

Evanna Lynch

as Rhaenys Targaryen in Game Of Thrones: Aegon's Conquest

Score: -6

Yvonne Strahovski

as Visenya Targaryen in Game Of Thrones: Aegon's Conquest

Score: -2

Emma Stone

as Mary Boleyn in Six Tudor Roses

Score: 0

Landon Gordon

as Edward VI in Six Tudor Roses

Score: +1

Elliott Kerley

as Edward VI in Six Tudor Roses

Score: -1

Alexis Bledel

as Mary I in Six Tudor Roses

Score: +1

Rose Leslie

as Elizabeth I in Six Tudor Roses

Score: +1

Rosamund Pike

as Catherine Parr in Six Tudor Roses

Score: +1

Sydney Sweeney

as Catherine Howard in Six Tudor Roses

Score: +2

Bella Ramsey

as Anne of Cleves in Six Tudor Roses

Score: +3

Evanna Lynch

as Jane Seymour in Six Tudor Roses

Score: +1