Among the coaches who won the 'ABA Coach of the Year' award, which is the coach with the highest number of won games?
"ABA Coach of the Year" is the award; highest number of won games refers to Max(Count(won))
SELECT T1.coachID FROM coaches AS T1 INNER JOIN awards_coaches AS T2 ON T1.coachID = T2.coachID WHERE T2.award = 'ABA Coach of the Year' GROUP BY T1.coachID, T1.won ORDER BY T1.won DESC LIMIT 1