Aule the creator, I think that you have already been exhaustively answered by other people about the reason the heroes you mentioned can't and won't be implemented in the game, if not in the Campaign or in a future Submod.
Also, I really feel that this discussion is getting too much dispersive, involving other completely different matters like the balance concerning the Dwarves related to the other factions.
Not to mention that the main reasons of this proposal have never really been backed and sustained by constructive and effective arguments other than stating that something is 'awesome', another thing is 'crappy' or the other factions are 'spam'.
I sincerely suggest you organise better, in the future, the elements behind an idea you want to expose, and express them with more suitable explanations.
For the reasons stated above, I lock this thread.
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