Prime Andrade would have had a shot, but obviously his beard is gone by now. The other guy who I could see just plain catching him is Berrio. He's powerful and sometimes just punches really fast. All that said, the perfect guy to beat him would be prime Roy Jones. I can't say he'll be better over the long haul, but I think the current version of Ward is basically Bernard Hopkins, with less power and less chin but more versatility and, dare I say it, maybe even more ring intelligence. Other than Hopkins, there isn't a single fighter with a good argument for having more ring intellect. Like Hopkins, his talent isn't spectacular - above average almost all the way around, but he just knows exactly what to do and his opponents almost never do. And I suspect that if an opponent figures him out for a round or two, he'd just change how he fights.
Landing a lucky temple/behind the ear shot. Honestly I had never heard of him before the Super 6. He totally schooled the 2 original belt holders. Landing a shot like Hernandez did on Cunningham only earlier in the round is the only way he can be beaten.
Andre, Anthony's too flat-footed. Wouldn't earn the respect and get eaten up. Not that Andre would, but his chances are increased.
Bute has all the tools that's why Ward is scared to face him. One uppercut and it's "Good night Irene!"