I actually typed that Manu was a close second, and deleted it because I decided I didn't feel like getting into any of the usual tonight. I agree with everything about Manu, I just saw Horry as something different and unique. Manu might go crazy and be everywhere on the court for a stretch. But Horry was like an assassin who knew just where and when to stick in the dagger. I know that's pretty dramatic, but he did it way too many times for it to be coincidence.
The real shame about that infamous "hip check" against Nash was that he alllllmost managed to pick up a charge. He had gotten knocked to the floor, got up, and sprinted to get in front of Nash. That wasn't a dirty play - it was a split second short of being sheer court genius. Had he gotten that charge, I'm convinced the Spurs would still have won that game.