Well, definitely most ugly model we have is Lazarus, but as we know alt model is on the way so let me think what else.
I'm personnaly in process of converting Sue an Bishop into female sculpt, so it is my suggestion. But again we have alt Bishop already and female sue is probably conflicting with main idea that it should be "MAN in black".
Other model that I want to have but didn't like the sculpt is Killjoy - it would be pleasure to see something less unattractive (with pants probably ) but still deadly terrifying.
And lastly I wish that our emissary looks badass as others, but I know it wouldn't be happen...