Suggestions by @henrirocha

Bobby Brazier

as Daemon II Blackfyre in A Knight of the Seven Kingdoms (all seasons)

Score: +1

Max Macmillan

as Emmon frey in War of the Nine penny kings

Score: +1

Noah Jupe

as Lord Blackwood in War of the Nine penny kings

Score: +1

Richard Fleeshman

as Lord Tarly in War of the Nine penny kings

Score: +1

Evie Templeton

as rhaella Targaryen in War of the Nine penny kings

Score: +1

Oliver Farnworth

as Roger Reyne in War of the Nine penny kings

Score: 0

Daniel Sharman

as Roger Reyne in War of the Nine penny kings

Score: +2

Alex Pettyfer

as Jason lannister in War of the Nine penny kings

Score: +1

Gregg Chillin

as Allequo Adarys in War of the Nine penny kings

Score: +1

Lucien Laviscount

as Samaro Saan in War of the Nine penny kings

Score: +1

Damson Idris

as Xhobar Qhoqua in War of the Nine penny kings

Score: +1

Angus Sampson

as Maelys Blackfyre in War of the Nine penny kings

Score: +1

Oscar Morgan

as Barristan selmy in War of the Nine penny kings

Score: +1

Harry Gilby

as Brynden Tully in War of the Nine penny kings

Score: +1

George McKay

as Jason lannister in War of the Nine penny kings

Score: -1

Daniel Sharman

as Gerold Hightower in War of the Nine penny kings

Score: +1

Billy Barratt

as Aerys targaryen in War of the Nine penny kings

Score: +1

Finn Elliot

as tywin Lannister in War of the Nine penny kings

Score: 0

Henry Cavill

as Ormund baratheon in War of the Nine penny kings

Score: +1

Désiré Mia

as Balerion otherys in Blackfyre Rebellion

Score: +1