NHF – new heroes for Heroes V 3.1.

Here are the Dwarves. They are simply retextured, meaning the creature models themselves weren't changed.
Although, it's not entirely clear why this bothers the authors, especially considering that all heroes have "skirts," which makes them impossible to miss (if the main complaint is about their size).

Not all heroes use skirts; also, a bright skirt highlights the current hero, and it's always the player's hero. Additionally, they have slow animations, and if you manually set a very fast animation, a footman like Alaric, for example, looks like a running dwarf. But at the same time, he moves slower on the map than his counterparts.