Hermione is the best role model in terms of resourcefulness and work ethic. Loyalty too. It is sort of glossed over just how much she helps Harry. She is willing to be quite ruthless to help her friends, but very effective as well. She blackmailed Rita into poverty to teach her a lesson, than further blackmailed her into writing Harry's story for free. She made sure that members of Dumbledore's army were safe, and severely punished and silenced the person who sought to betray them. She also was willing to lie on the spot and lead Umbridge to the centaurs, whom she knew would "take care" of her. If you think about it her ruthlessness is sort of frightening, but then you realize it is only used against bad people, and in defense of her friends.
Ron.... is a good chess player? Idk..