Suggestions by @jacobking1

Woody Strode

as Jamis in Dune (1950s)

Score: +2

Martin Landau

as Piter De Vries in Dune (1950s)

Score: +1

Edith Evans

as Mother Mohiam in Dune (1950s)

Score: +1

Roddy McDowall

as Paul Atreides in Dune (1950s)

Score: +2

Charles Laughton

as Baron Vladimir Harkonnen in Dune (1950s)

Score: +1

Anthony Quinn

as Stilgar in Dune (1950s)

Score: +1

Dorothy Dandridge

as Chani in Dune (1950s)

Score: +2

Jeffrey Hunter

as Legolas in Lord of the Rings Trilogy - Old Hollywood (1950s)

Score: +2

Grace Kelly

as Galadriel in Lord of the Rings Trilogy - Old Hollywood (1950s)

Score: +2

Boris Karloff

as Saruman in Lord of the Rings Trilogy - Old Hollywood (1950s)

Score: +2

Hugh Griffith

as Gimli in Lord of the Rings Trilogy - Old Hollywood (1950s)

Score: +1

James Murray

as Rogal Dorn in Warhammer 40k: The Horus Heresy (Amazon)

Score: +1

Ferdinand Kingsley

as Erebus in Warhammer 40k: The Horus Heresy (Amazon)

Score: +1

Cathy O'Donnell

as Wendy Torrance in The Shining (1950s)

Score: +2

Richard E. Grant

as Julius Caesar in Armando Iannucci's 'The Assassination of Caesar'

Score: +1

Rowan Atkinson

as Cicero in Armando Iannucci's 'The Assassination of Caesar'

Score: +1

Armando Iannucci

as Director in Armando Iannucci's 'The Assassination of Caesar'

Score: +1

John Simm

as Luther in Warhammer 40k: The Horus Heresy (Amazon)

Score: +3

Tom Hopper

as Lion El Jonson in Warhammer 40k: The Horus Heresy (Amazon)

Score: +1

Alex Tarrant

as Hathor Maat in Warhammer 40k: The Horus Heresy (Amazon)

Score: +1