One of the most whitewashed characters in Fantasy/Science Fiction literature is Ged of the fantasy standard Earthsea series by Ursula K. LeGuin.
Ged and literally everyone except Tenar of the Ring in the entire frickin series has either brown, red-brown, or black skin.
Whitewashed on book covers:
Whitewashed in fanart:
Whitewashed most egregiously in the American Sci Fi Channel miniseries:
PLEASE READ URSULA K. LEGUIN’S AMAZING REACTION TO THE WHITEWASHING OF HER WORK : A Whitewashed Earthsea: How the Sci Fi Channel Ruined My Books.
And on the issue of Gedo Senki, studio Ghibli’s production based on the Earthsea series, and the issue of race being slightly more complex and ambiguous considering it is an entirely Japanese production.
Some stills from Gedo Senki:
I found out Leo and Diane Dillon, of whose art I am a huge fan of, did a cover for Earthsea at some point, and it is one of the few that comes close to resembling his skin tone the way it is described in the books: