Good reference/inspiration for how facial elements can be 'pushed' in abstract ways to give me interest and differentiation to characters. Could be excellent for this project and even gives ideas to cross over into animal faces.
The different armies of the Dwarven Monarchs. Each has their own unique style, but overall there is a consistent style that is kept in-tact. Dwarves do not vary their armor for different types of units.
Legolas - I think this captures him well, particularly with the precise detail in some areas, and the blurred hiddenness of others. Legolas was just like that, appearing clear and open, but there were things he kept to himself. I agree.