It's obviously subjective so there are no wrong answers. Wayman was not strong defensively, but he could rebound and block shots. Offensively, no OU player before or since ever had to deal with triple-team coverage at times like he did. He's simply the best player in OU history - and unlike football, OU has a hoops player with a major award attached to his name. The "Wayman Tisdale Award" is given annually to the nation's best freshman. Wayman was the first-ever freshman to be selected as a 1st team AP All-American. Granted, freshmen could not play prior to 1972, but here is a sampling of guys playing college hoops the year Wayman was selected as freshman All-American - Michael Jordan, Hakeen Olajuwon, Clyde Drexler, Patrick Ewing, Charles Barkley, John Stockton, Karl Malone, Chris Mullins, and on and on and on.
Blake Griffin's sophomore year was as good as any accomplishments Wayman had, though against far weaker competition. Yes, Stephen Curry and James Harden were playing at the same time, but the guys I listed in the prior paragraph dwarf the competition Blake had to go up against. Tyler Hansbrough was considered one of the two or three best players in college basketball in 2009, but doubt he'd be in the top 50 when Wayman was playing.
One other guy I'd mention is Alvan Adams. I was a bit young when he was playing at OU, but would love to hear about how great he was from those who remember his college years.