A pure boxer or counter puncher that doesn't hurt Amir will have a very hard time beating him. He throws so much, so fast and his reflexes are so good, that unless you're a pressure fighter that walks him down (or your name in Floyd Mayweather), you don't stand much of a chance in my opinion.
Koltelnik took 2/3, Mcckloskey 1, Maidana 4 (if he didnt throw the elbow he could of had 5) and Pualie 1.
I watched the Kotelnik fight recently. Khan dominated most rounds with sheer workrate, keeping Kotelnik shelled up behind that tight guard. Really impressive win in hindsight... moving up in weight and barely losing a round against an extremely underrated title holder, 2 fights after being starched in the first round.