Suggestions by @markclaunch

Skai Jackson

as Flaxx in Once... The Book of Merlin

Score: +1

Joseph Gordon-Levitt

as Novak in Once... The Book of Merlin

Score: +1

Zachary Quinto

as NoNac in Once... The Book of Merlin

Score: +1

Elle Fanning

as Zara in Once... The Book of Merlin

Score: +1

Wallace Shawn

as Zoozle in Once... The Book of Merlin

Score: +1

Sabrina Carpenter

as Friggs in Once... The Book of Merlin

Score: +1

Djimon Hounsou

as Fraggs in Once... The Book of Merlin

Score: +1

Björk

as Wattle in Once... The Book of Merlin

Score: +2

Ben Kingsley

as King Pellinore in Once... The First Book of Arthur

Score: +1

William H. Macy

as King Mark in Once... The First Book of Arthur

Score: +1

Dragon

as Kaliden - The Dragon in Once... The Book of Merlin

Score: +1

Harrison Davis

as Young Sir Dagonet in Once... The First Book of Arthur

Score: +1

Donnie Yen

as Wu-Xi in Once... The First Book of Arthur

Score: +1

Lizzo

as Jatell in Once... The Book of Merlin

Score: +1

Ewan McGregor

as Whittle in Once... The Book of Merlin

Score: +1

Alan Tudyk

as Odo the Odo in Once... The First Book of Arthur

Score: +1

Warwick Davis

as Balor the Mighty in Once... The First Book of Arthur

Score: +1

Dev Patel

as Jibrīl in Once... The First Book of Arthur

Score: +1

Krysten Ritter

as Annowre the Sorceress in Once... The First Book of Arthur

Score: +1

Rihanna

as Mabb the Black in Once... The First Book of Arthur

Score: +1