@Gilz2 - Agreed, I wouldn't mind seeing unique units like that. I'd still love to see my Fictional ones in there but I think that both ideas would work just as well. I don't think I'd make any of them Extremely hard to kill or anything of that nature although each of them would certainly stand out abit (So, basically they'd have a unique skin but it wouldn't stand out like some sort of sore thumb, it would certainly fit.) And they could act as an Officer or what have you and inspire of the men.
Again, My idea (Because they are Fictional) would be completely optional.
But once more I'll say that the idea to put in true characters from the war itself is a great idea in my opinion.