HQ is the commanders of an army. These are the most terrifying Orks you can get.
This is the Warboss and some of his nobs. To the right you can see my "Black nob".
Here is the warboss and his whole bodyguard.
This is Warlord Ghazghkull Mag Uruk Thraka.
Here is Ghazghkull with his assistant Makari.