Maybe you meant Horry b/c Fisher was Patty status (bigger but slower) on defense & it was Lue that was the defensive stopper. Fisher took charges & hustled but that was about it. He was also in the starting lineup in '99. The weird thing about the '99 series was Kurt Rambis putting Fox on Tim.
What transformed their defense from '99 to '00 (had the #1 rated defense) was Shaq/Kobe committing themselves to playing defense (after Phil challenged them) along with Ron Harper playing major minutes & AC Green replacing JR Reid. Otherwise, Fisher was CoJo status during the 2000 playoff run (Shaw was playing the Patty role) along with Fox playing behind Rice.
During the 2001 playoff run, their role players made teams pay for doubling Shaq like the 2-peat Rockets which was what made them lethal.