Skull of Shadows (SoS) is a Polish mod that replaces all the factions.

Unfortunately, no, because I don't know how to make mods (I tried, but I'm too dumb and don't know the basics of C).
Unless, of course, I just look at the game and note which models are good, and then pass their names on to someone who knows how to work with the code part of mods.

Added 12 minutes later
However, if someone agrees to teach me, I'll give it a try.

It's not that difficult. I figured out how mods work in two weeks of work, and now I'm doing whatever I want (my own neutral creatures based on NCF + replacing creature banks with more interesting versions). And what code are we talking about? An editor + notepad, and that's all you need. After many attempts and the editor/game interaction, experience will come, and then mods of all kinds.