I'd go with Chad Dawson, despite giving him a lot of crap he puts together some lethal stinging combo's something Hopkins will have to watch out for. Which other fighters do you have :think
As mentioned, JMM. The man is poetry in motion, not a single wasted shot. Cotto can put nice combos together, he threw one in the Pac fight, left hook to the body, followed by a left uppercut and a right hand, I loved that. Canelo can throw nicely when he decides to open up, nowhere near Marquez's level but nice to watch all the same. The best I've seen is Sugar Ray Leonard, even the tapes of him at the Olympics, his punching fluidity was phenomanal
And still...the undesputed combo King! This content is protected [ame]http://www.youtube.com/watch?v=Hv7zyil9QwQ[/ame]
JMM is one of best I've ever seen. Just perfect timing, technique and positioning. If he had pacquiao's athletic ability he would be unstoppable.