See this is why stats lie sometimes. As far as impact on the program as a player during my time as a fan I would put the likes of Russell, Glass, Shelton Jones, Bootsy, Hatten, Postell, Barkley and Hardy before Lopez. That is eight right there before you even get into the heavyweights. Felipe probably falls into 15-20 range for me personally.
Williams, Harvey, Wennington, Davis & Johnson were all better than him too.
Def Harvey. Maybe Williams, never saw Davis and Johnson but I would put Lopez over Wennington.
Obviously, Mullin, Berry, Jackson, Sealy, Artest in addition to the others I mentioned.