William Daniel Johnson isn't a Republican. He's a member of the American Freedom Party. Retired white nationalist California psychology professor and conspiracy theorist Kevin MacDonald is also a member of the American Freedom Party. Richard Spencer is an independent. Are Craig Cobb and Andrew Anglin Republicans? Many white supremacists belong to third parties or don't belong to any party.
I put Johnson on there because he was nominated as a delegate to the 2016 Republican convention, and while I couldn't find Anglin and Cobb's party affiliations they're avid Trump supporters so I assumed Republican was the best bet. If you'd like I'm sure I can dig up some other ghouls to replace them.
And yeah it looks like Spencer is an independent. I replaced him with Ben Garrison.