Depending on how confident you are at green stuff-ing, you could do a few things.
My first one was just an over-decorated cold-one rider with a spiffed up base, but if i were going to do another one, I'd use the dark elf cold one and the carnosaur oldblood. Either that, or the legs of the cold one riders and the torso of a temple guard (they're chunkier). If I didn't have access to the carno old blood head, I'd do something similar to what I did for my last conversion (see signature).