Suggestions by @multiplefan

Patrick Stewart

as Varys in Game of Thrones (1998-2010)

Score: +1

Judy Dench

as Olenna Tyrell in Game of Thrones (1998-2010)

Score: +2

Monica Bellucci

as Melisandre in Game of Thrones (1998-2010)

Score: +1

Malcolm McDowell

as The High Spraow in Game of Thrones (1998-2010)

Score: +1

Freddie Highmore

as Bran Stark in Game of Thrones (1998-2010)

Score: +1

Tyler Mane

as Tormund Giantsbane in Game of Thrones (1998-2010)

Score: +1

Lesley Manville

as Catelyn Stark in Game of Thrones (1998-2010)

Score: +1

Nick Frost

as Samwell Tarly in Game of Thrones (1998-2010)

Score: +1

Brian Cox

as The Mad King in Game of Thrones (1998-2010)

Score: +1

Alan Rickman

as Stannis Baratheon in Game of Thrones (1998-2010)

Score: +1

Macaulay Culkin

as Joffrey in Game of Thrones (1998-2010)

Score: +1

Evanna Lynch

as Sylvi in Game of Thrones: A Telltale Games Series

Score: +1

Shaun Dooley

as Croft in Game of Thrones: A Telltale Games Series

Score: 0

Robert Carlyle

as Denner Frostfinger in Game of Thrones: A Telltale Games Series

Score: +1