Suggestions by @derekarmstrong

Patrick Warburton

as Rock Bitter in The Neverending Story Remake

Score: +1

Ian McKellen

as Rock Bitter in The Neverending Story Remake

Score: 0

James Earl Jones

as Rock Bitter in The Neverending Story Remake

Score: +2

Liam Neeson

as Rock Bitter in The Neverending Story Remake

Score: +1

Katherine Langford

as Dorothy Gale in Classic Children's Books

Score: +1

Chris Pratt

as Tin Woodman in Classic Children's Books

Score: +1

Benedict Cumberbatch

as Cowardly Lion in Classic Children's Books

Score: +2

James McAvoy

as Tin Man in The Wizard of Oz

Score: +1

Lily James

as Andrina in The Little Mermaid

Score: +3

Martin Freeman

as Grimsby in The Little Mermaid

Score: -1

Karen Gillan

as Attina in The Little Mermaid

Score: +3

Liam Neeson

as urSu in The Dark Crystal: Attack of the Garthim

Score: +6

Benedict Cumberbatch

as skekUng in The Dark Crystal: Attack of the Garthim

Score: +3

Robert Pattison

as Prince Eric in The Little Mermaid (The Live-Action Remake)

Score: -9

Gerard Butler

as King Triton in The Little Mermaid (The Live-Action Remake)

Score: +3

Katie McGrath

as Vanessa in The Little Mermaid (The Live-Action Remake)

Score: -1

Lily James

as Andrina in The Little Mermaid (The Live-Action Remake)

Score: +1

Katherine Langford

as Aquata in The Little Mermaid (The Live-Action Remake)

Score: +2

Daisy Ridley

as Alana in The Little Mermaid (The Live-Action Remake)

Score: +2

Anya Taylor-Joy

as Arista in The Little Mermaid (The Live-Action Remake)

Score: +1