Suggestions by @jacobking1

Rebecca Ferguson

as Sarah Connor in Terminator 2: Judgment Day (2021)

Score: +4

Celeste Holm

as Hera in Hercules as a 1950s Epic

Score: +2

Agnes Moorehead

as Lachesis in Hercules as a 1950s Epic

Score: +2

Margaret Hamilton

as Clotho in Hercules as a 1950s Epic

Score: +2

Ray Harryhausen

as Practical Effects in Hercules as a 1950s Epic

Score: +2

Ernest Borgnine

as Pain in Hercules as a 1950s Epic

Score: +2

Vincent Price

as Hades in Hercules as a 1950s Epic

Score: +3

Thelma Ritter

as Atropos in Hercules as a 1950s Epic

Score: +2

Peter Falk

as Phil in Hercules as a 1950s Epic

Score: +2

Billie Holiday

as Melpomene in Hercules as a 1950s Epic

Score: +2

Ella Fitzgerald

as Calliope in Hercules as a 1950s Epic

Score: +2

Carmen McRae

as Terpischore in Hercules as a 1950s Epic

Score: +2

Dinah Washington

as Thalia in Hercules as a 1950s Epic

Score: +2

Sarah Vaughan

as Clio in Hercules as a 1950s Epic

Score: +3

Jack Elam

as Panic in Hercules as a 1950s Epic

Score: +2

Tab Hunter

as Hercules in Hercules as a 1950s Epic

Score: +2

Jane Russell

as Megara in Hercules as a 1950s Epic

Score: +3

James Stewart

as Spirit of the West in Rango as a 1960s Western

Score: +1

Jack Elam

as 'Roadkill' in Rango as a 1960s Western

Score: +1

Lee Van Cleef

as Rattlesnake Jake in Rango as a 1960s Western

Score: 0