I agree, there are quite a few guys taller than Shaq. But the big difference (pun intended) is that those taller guys are smaller than a telephone pole. Secondly, at that height, it doesn't take a lot of talent to put a basketball into a hoop when the basket is only 2-3 feet higher. That, is also the fact that the refs allow him to have a boxing and elbow match everytime he pivots...
Yes, he can do some nice things, but if he was only, say, 6'5", he would be mediocre.