Suggestions by @adrianmarin

Gal Gadot

as Tarzan in Tarzan

Score: -17

John Debney

as Composer in Tarzan

Score: 0

Liam Neeson

as Scar in The Lion King (Alternate Fan Cast)

Score: -2

Morgan Freeman

as Rafiki in The Lion King (Alternate Fan Cast)

Score: +3

Cate Blanchett

as Sarabi in The Lion King (Alternate Fan Cast)

Score: +4

James Earl Jones

as Mufasa in The Lion King (Alternate Fan Cast)

Score: +3