There should be more people of color in viking movies to enhance realism. History isn't being properly realized when you omit all the black and Asian vikings.
Were the Vikings Black? Get the Facts Written by Christian Christensen in Vikings https://scandinaviafacts.com/were-the-vikings-black/ The stereotypical image of a Viking, thanks in part to depictions of them in popular culture, is that they had white or light-colored skin and blonde, or sometimes brown, hair. But did all of the Vikings look like that? Were there any black Vikings who had brown skin? A small number of Vikings had black—or brown—skin, according to reliable historical evidence. For centuries, dark-skinned people either willingly traveled to Scandinavia or were forcibly taken there as slaves. Over time, some assimilated with the Vikings through farming, marriage, combat, and other cultural factors. Learning about the different races of people found in Viking culture—even if they were few in number—is important to learn when studying the history of the ancient Scandinavian people. (Much more at above url including historical references)