Plagues start with a single infected individual. The pic containing a glossy, waxy hairless bee is of concern to me, regardless of color, as the gloss/wax is a characteristic symptom of some nasty virulent virus affecting honeybees. I would definitely place the hive pictured on my radar. I am not saying your hive has a virus issue, let me be clear. I am saying I see a characteristic symptom(s) of virus in the pic posted.
Best to your bees, Mr. 30WCF.