ohio state
That would be a tie between schools including UNLV, Baylor, and Kansas. Contrary to the last answer, Kentucky does not lead in this category, and in fact had only one serious case of an infraction in the Mills incident. The University has not suffered any other major infraction.
Stanford with 6 NCAA Titles (1992, 1994, 1996, 1997, 2001, 2004)
Oregon
That depends on what you mean by NCAA. The Wisconsin Badgers have been to the NCAA Tournament 18 times. Their most recent appearance was in the Sweet Sixteen in 2012. The Badgers have not won the NCAA Tournament since 1941.
Florida
bama...hands down. 16 different teams at the same time for 3 years....18 consecutive years...some of the most egregious violations ever brought before the SEC. Bama NCAA violations make most other schools' look like jaywalkers.
FSU
uconn
big ten
University of southern California
California