In 4e, there's no "skill monkey." There's no real division of skill labor. Everyone is expected to fight, and mostly fight, to distinguish themselves.
It is one of the issues with the edition, in my mind, though the roles do a great job of distinguishing combat abilities.
I won't deny that 4e D&D is going to be primarily about dungeon crawling combat (it is D&D after all) but I would say that the classes are expected to distinguish themselves through skills as well. That is, there are lots of overlapping skills but each class brings approximately the same amount of skill proficiency to the table, just as they bring the same amount of combat proficiency.
So do you find it a problem if there isn't a skill-focused character who cannot fight as well? After all, more rules for encouraging roleplaying can always be added to the system, but having specialization in subsystems would be radically different to 4e's "never split up the party" philosophy. Character roles concentrating on subsystems means that you take turns at the table playing to your character's strengths, whereas 4e expects both combat and skills to be something that all members of the party participate in cooperatively.