Muskox cavalry would be fitting for the ice tribes.
Regarding characters, I was going to suggest wailing women as a nod to Mark?s iconic 28mm ancient Germans for Foundry. However, as both sexes fight in your range, wailing non-combatants would be more appropriate. The idea of the wailing, apparently, was to encourage the fighters to do better in order to avoid all sorts of unpleasantness befalling the wailers.