1st level) goblins, trappers, goblin shamans (all from Heroes 5), goblin archers (goblins from Heroes 6)
2nd) gnoll (from Heroes 3 or 7), orc warrior (Heroes 5), crusher (orc from Heroes 6), warmonger (Heroes 5)
3rd) centaurs, battle centaurs (Heroes 5) (you can use female models from Heroes 6 or 7), lizard archer, lizard warrior (units from the Fortress faction in Heroes 3 or a neutral unit from Heroes 7)
4th) daughters of earth (Heroes 5), daughters of the sky (models of harpies or furies, from Heroes 6 or 7), war jaguars (from Heroes 6), war panthers (from Heroes 6)
5th) assassin (Heroes 5), chieftain (Heroes 5), dream catcher (shaman, from Heroes 6, can be a sorcerer), gorgon (mighty gorgon, can be units from the Fortress faction in Heroes 3)
6th) wyvern (Heroes 5), paoka (Heroes 5, can be green), basilisk rider (from Heroes 7), halberdier on basilisk (from Heroes 7)
7th) cyclops (Heroes 5), free cyclops (wild, enraged, Heroes 5), monster (from Heroes 7), ancient monster (from Heroes 7).
P.S.: Continuing the theme with the 4th branch, you can give the Demons models from Heroes 6 as the 4th branch, and Humans, similarly, models from Heroes 6 in the 4th branch. The other 4th branch options in the NCF mod fit the atmosphere of Heroes; you can only add the 4th level creatures of Gnomes, where berserker (replace) is added to the 4th branch with valkyries from Heroes 7. And also, is there a mod that allows you to use the Sanctuary mod (http://forum.heroesworld.ru/showthre...=11301) (the water faction from Heroes 6) as a separate 9th faction, or at least to be able to set it up and play as it in the editor (without replacing other factions)?
Of course, not exactly the models from Heroes 6 and 7, but similar ones. I saw the gnoll (maybe it can be enlarged) and lizard models in the RTF and Cytadel mods (Polish).
Can you create models of new units based on existing ones?