Here are two more Groups to concider
Werecreature-Anthro hybrids
Like most werecreatures, they have two forms. However, these people do not have a human form. For instance, a person who is half werewolf and half wolf-anthro will always be a wolf creature, though if say mother's fur was black and father's was white, the person can change its fur between black and white. Likewise, if the person's parent was a fox inseed of a wolf, they'd change between a fox and a wolf. Also, you can use any combination, for instance, what if that harmless looking rabbit anthro was really half werewolf, or was a wererabbit that was half wolf-anthro. Talk about a surprise for the enemy when they see that cute rabbit turn into a ferosious wolf and come after them insteed.
Demons
While demons must follow the Laws of Hell, and drag the occasional evil soul or person their to burn, they are free to do as they wish.
However, when they enlist in the military, they must also follow those rules as well. For instance, they cannot exorcise the spirit of a fallen soldier, especially if they are waiting for thier body to be found and healed, or, if their body was obliterated, still follows the rules and rugulations, unless the person is a traitor.
Also, they are forbidden to do anything that could affect the other soldiers. This means that they cannot have the other soldiers sell their souls to improve their preformances, or anything like that. However, they are free to do whatever they want to do to the enemies of the country, and do what ever they want to traitors and deserters
Or, you can make another humanoid race, just leave options for others.