I graduated from OU in '69 so I've watched a lot of Sooner basketball. You've mentioned a lot of the recent players from the last 20 years, but nobody except Booger has gone back further than that. I began watching OU back in the old fieldhouse.
Some of rhe notable names from the 60's were OU's first AA player in Don Sidle. Silky smooth big man. Also Garfield Heard and Clifford Ray.
I liked the scrappy pair of Bobby Jack and Scott Martin in the early 70's.
I liked John McCullough, Cary Carrabine, Al Beal, and Aaron Curry from the Dave Bliss era.
Then came Billy Tubbs. I'm surprised nobody has mentioned Nate Erdman or Ryan Minor. Both were centerpieces on their teams. You guys have mentioned Ernie Abercrombie, but there were others who toiled in the trenches. Charles "Bigtime" Jones, Evan Wiley, and Renzi Stone were a few I remember.
Of course there was the great '88 team. People remember Harvey Grant, Stacey King, and Mookie Blalock. Ricky Grace was a good guard and Soonerinkc already mentioned Dave Seiger ..... and Choo Kennedy.
Gotta include Jeff Webster. PG's I really liked were Jon Ontjes and Quannas White. I suppose I should include Terry Evans, too. That's all I can think of right now because the last 20 years have already covered pretty well in this thread. I know David Godbold has been mentioned a lot ... he came to OU as a walk-on out of Douglas HS in OKC.