Suggestions by @davidmonkman

Kate Winslet

as Boromir in The Lord of the Rings (Gender Swap)

+3-3Score: 0

Mads Mikkelsen

as Galadriel in The Lord of the Rings (Gender Swap)

+2-3Score: -1

Tilda Swinton

as Saruman in The Lord of the Rings (Gender Swap)

+2-0Score: +2

Anya Taylor-Joy

as Frodo Baggins in The Lord of the Rings (Gender Swap)

+5-2Score: +3

Judy Dench

as Bilbo Baggins in The Lord of the Rings (Gender Swap)

+1-2Score: -1