Suggestions by @zosiasiwiak
7 suggestions

Moriah Rose Pereira
as Luna Lovegood in Harry Potter
+1-4Score: -3

Taylor Momsen
as Marlene McKinnon in Fancasting the ATYD characters (feel free to add your own!)*
+2-1Score: +1

Sophie Thatcher
as Marlene McKinnon in Fancasting the ATYD characters (feel free to add your own!)*
+3-2Score: +1

Odessa A'zion
as Marlene McKinnon in Fancasting the ATYD characters (feel free to add your own!)*
+2-1Score: +1

Kaya Scodelario
as Hestia Jones in New Marauders Fancast
+1-1Score: 0

Maude Apatow
as Hestia Jones in New Marauders Fancast
+1-1Score: 0
Benjamin Wadsworth
as Theodore Nott in Harry Potter
+5-23Score: -18