Jus to be a bit more constructive than on FB, I really love the 2 last sketches because they look punish and raw and yet they have good visual refs like the samurai mask and things like that. the armor on the first one is a bit too elaborate for what I see as Evil space dwarves. like I told you Chico, I really like the fact they're "evil" and not chaotic, that makes them fit particularly well in a RT setting because it makes you rid of the mutation stuff and the worshipping part which would only get in the way here. With your concept they retain their dwarf identity but they gain that nasty vibe I adore.
I'm buying a model form the 2 last concepts right away.
The last one looks a little too orky for my taste. I think it's the tusks. (Mind you, I love orks, but it interferes with the evil "Dwerog" vibe. . . . on the other hand, maybe that's what orks are.) Alternately, maybe he's a half orc-dwarf and that's why his gang went evil? The tank chair's a go. Love that.