Well not Tuska. He and his WAAAGH was moved to the throne of Khorne so he could personally watch the Orks fight and kill every day for the rest of forever. Why can't we have Gorgutz? Or better yet, Kaptain Bluddflag? Because he has a pirate hat and striped sailor pants. That automatically qualifies him as an awesome boss to follow.
Copyright reasons most likely on love able old Bluddflag and Gorgutz (who personally I'm not a fan of). They're relic property so bE can't touch them I'm afraid. Tuska could still work especially if we got a nice little scripted mission where Chaos has opened a portal to Khorne's throne and all kinds of crap pours out along with Tuska's WAAAGGH
Always follow a mek boss because you can always depend on them to come up with some really awesome looking kit and some insanely stupid things, though it is mostly the latter I'm afraid.
Zogwart needs some Gitz to shuffle him into da fight. I might have to roll an alt account just to give him a bump.
Da Beast o' course. Nuffin' beta tha' beatin da scrap out o' da Imperium gitz unda da mightiest ork diz Universe has eva' known.