I think a modern fictional character that would come closer to the Jekyll-and-Hyde relationship as espoused in the parent article is the CW show Arrow. Oliver Queen is a harmless playboy in the public view (and in the last season, the mayor of his city), but he puts on the hood and does things, sometimes unspeakable things like torture and murder, in order to achieve his greater goal of "saving his city" from crime while leaving his public persona untarnished. He struggles with the notion that perhaps the Green Arrow persona is his true nature rather than the one he presents to the public.

Of course, that character assessment essentially apes Batman/Bruce Wayne as well; Batman is Hyde, Bruce is Jekyll, but Hyde and Jekyll are the same person with the same drives and impulses.