I can't think of anyone you've left out. That's the Region that I played in, 1962-65. We got to the Final game of the Regional Tournament in 1964, when our area was in the 5th Region. Lost to Allen County. One of the several great regrets of my life. Allen County went to the semifinals of the State Tournament that year.
I've thought a lot about the question since this thread was posted, and I can't think of anyone who contributed more significantly to U.K.'s basketball team during his tenure than J. P. Blevins.
Two of the greats from the old 5th Region were in the 1964 Regional tournament - my teammate and lifelong friend Bob Brizendine of Franklin-Simpson H.S., who averaged 22 ppg that season and later played at Georgia Tech; and the great Richard Travis of Bowling Green High Street H.S. who played at Oklahoma City University and was the 7th leading NCAA ppg scorer in the country in 1967. Alas ... neither of those great players went to U.K.