[Growltigga]

Phoenix D, the names of the leaders are probably tricky to pin down - as I recall, they were as follows

The Gorm had no overall Il Duce leading them but had an "Assembly of 200" and then an executive 'Council of 20". No use to you I guess but their main admiral in the Khanate-Gorm war was "Force Leader Hanaku"

The Opuichi also had no single individual granted with the executive mandate. One of their admirals was called 'Admiral Haraanaatha" is that helps

The Khanate is easier. Khan Lihaarnow (ie Lihaarnow the Great) would be your main man
(I dont know who the Khan was at the time of Insurrection and the Bug War)

You will need to read the books to find out who led the Coreworld and Fringe elements of the Federation as I cannot recall

Hope this helps