Hey this looks really interesting, and I wonder if you are still accepting.  I'm thinking of a general or minor king who was betrayed in life before he could make his stand against the undead(possibly by callidus idk).  In death he has kept his discipline and pride because in his mind he never lost to the necromancer.  He requires all of his "soldiers" to look presentable just like in life.  This now includes polishing bones and such like that.  For appearance wise him and his I'll would look something like the ossiarch bonereapers from AoS.  Such as they all appear mostly uniform and still wear armor, but it is now made from bone.  That is all I have so far.