This is what I've been using for my Space Wolves:
This was done with my airbrush, but the colors come out about the same
The basecoat is The Fang, followed a 45 degree spritzing of Russ Grey, with a 0 to 10 degree (or thereabouts, I wasn't good at math) shot of Fenrisian Grey.
For the
TWC and wolves, I would suggest a midtone brown, wash with Agrax, paint up with a lighter brown and then drybrush the tips a nice frosty grey (probably not one of the three "wolf" paints used above).