These are top 7 year runs by Tubbs and Sampson. This is from soonerstats.com and the ranking is the last AP ranking before the tourney.
Tubbs
'84 29-5 #7 ranking 1st in Big 8, 0-1 in NCAA tourney
'85 31-6 #4 ranking 1st in Big 8, 3-1 in NCAA tourney
'86 26-9 #15 ranking 3rd in Big 8, 1-1 in NCAA tourney
'87 24-10, NR 2nd in Big 8, 2-1 in NCAA tourney
'88 35-4, #4 ranking 1st in Big 8, 5-1 in NCAA tourney
'89 30-6 #4 ranking 1st in Big 8, 2-1 in NCAA tourney
'90 27-5 #1 ranking 2nd in Big 8, 1-1 in NCAA tourney
Sampson
'99 22-11 NR 2nd in Big 12, 2-1 in NCAA tourney
'00 27-7 #12 ranking, 3rd in Big 12, 1-1 in NCAA tourney
'01 26-7 #13 ranking, 2nd in Big 12, 0-1 in NCAA tourney
'02 31-5 #3 ranking, 2nd in Big 12, 4-1 in NCAA tourney
'03 27-7 #3 ranking, 3rd in Big 12, 3-1 in NCAA tourney
'04 20-11 NR, 7th in Big 12, NIT
'05 25-8 #17 ranking, 1st in Big 12, 1-1 in NCAA tourney
Why isn't Tubbs' run the standard? Because it was best
And no, that isn't to belittle Sampson's run, because that 7 year run is very good.
Tubbs is the peak of OU basketball. Tubbs has the best coach at OU, and everyone knows it. Sampson was the 2nd best. He did well in the regular season, but post season he struggled.