For everyone that likes Warhammer 40k Tabletop and Dawn of War Games or anything to do with Warhammer 40K.
My version of how the Dark Angels head honcho would (or SHOULD) look. He needed to have long blonde hair and a beard, the rest was up in the air.
Face model actually based on a certain video game protagonist, maybe you'll recognize him.
Only Geralt of Rivia comes to mind. (But only from the wallpapers of The Witcher 3; the in-game model looks different).
Geralt it indeed was, with new hair, new eyes, new beard and new textures in general. Only the model remains, really, all surface details were overhauled.
His face has the strength and intensity of a primarch to it, especially one that could be likened to a fierce hunting beast. Almost wolf-like, which is why I'll also use him as the template for Russ.
I think using this template for Russ as well would really reinforce that brotherly connection the Primarchs all share.