Just my opinion, but I would have ranked Guzman #1 and Heriberto Lazcano Lazcano #2. I don't know a lot about the European OC gangs, but it seems to me the Mexican Cartels are the most violent and powerful OC gangs operating right now.
It all comes down to territory and where you are. In Europe, among the most violent and powerful are for example the Italians. The Mexicans don't mean much over here. Sure, they do business with the European syndicates, and sure they can send a hit team down here, but in the end, they are guests.
Same can be said vice versa. And in the end, it's all a pointless pissing contest.
