Maidana had a few of them. The Cayo one is a good shout, but my favorite is his destruction of Martinez. Be sure to watch the replay for a better angle: This content is protected
The best ones are where the ones being stopped are in physical agony. There are few examples better than Hatton's vicious stoppage over Freddie Pendleton (skip to 15:10): This content is protected Relikh had a rib-crunching knockout over Gilchrist awhile back. You can hear Gilchrist grunt after he catches a left hook: This content is protected You won't see many more dramatic body-shot stoppages than this: This content is protected I have more, but these are some of the best examples. I also loved Kessler's straight right hand knockout over Magee. Great shot.
I wouldn't mind, though it seems unlikely he will ever have the proper motivation. Maybe he can entice Matthysse out of retirement so they can both make a little extra cash.
He's not a classic fighter (yet) but that Inoue kid is a savage body puncher. Also, Hopkins over De La Hoya.