I can't remember his name now but who was the coach at Muncie Delta in the mid-late 80's? He coached a few pretty good wrestlers and was also active in the off season as well.
Others that I agree with that have been mentioned already are
Lance Rhodes even though I didnt like him personally you can t argue with his success
and
Royce Deckerd--very dedicated year round and a great guy too
Also I may be a little biased here but Tom Knotts is not too bad either. He may not have the numbers some of the other coaches put up but he has taken bad teams and made them competive again more than once. Again he is also one who has helped with Indiana Wrestling as a whole in the off season