If there was only 1 Champ in each division in boxing?

If there was only 1 Champ in each division in boxing, who all will be the champs right now. Also, what would have the Klitschko's done.
Update: one champion means more competition among top fighters.
Update 2: http://www.theguardian.com/sport/queensberry-rules-boxing-blog/2013/oct/15/boxing-one-champion-every-weight
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