So it's not "this is the person most wikipediaed in this city" but rather, "this is the person amongst those who are affiliated with this city, who is the most wikipediaed"
Your two version aren't in conflict, although the first is ambiguous. Are you just clarifying that that, in the first version, "in this city" is supposed to be a modifier of "person" rather than the "wikipediaed"?
They are totally different things. The first is influenced solely by Wikipedia users in the city in question. The second is influenced by a combination of all Wikipedia users and Wikipedia's association of people with the city in question.