[Kharn The Complainer]

Well, Forgeworld has already released Loken and Abaddon. With some funky conversions you could make up Aximand and Torgaddon.
A few people seem to have attempted it, but I can't say that, in general I'm impressed with the results.

Except this conversion of Torgaddon...which I like.

Regarding paint schemes...this one is nice.