One name I'll also throw out for consideration from back in Jeff Harp's day, in fact he was Jeff's 1982 classmate, is Roger Reisz. Roger was runner-up as a junior and senior to David Palmer of Muncie Delta, a 3X himself. If not for Palmer, he likely would have won a state title, but as good and dominant as Roger was, Palmer was evidently just on a different level.
As memory serves, Palmer was ranked 1st in the country at his weight, if not even considered the best high school wrestler in the country regardless of weight class. Although I'm not 100% certain of this, I seem to recall he committed to one of the wrestling powerhouses for college - Oklahoma or Iowa State? - but I'm not sure how his career really played out at that level. Perhaps injuries somewhat derailed his career? Regardless, although I never saw him wrestle personally, he must have been a truly great wrestler and certainly one of Indiana's best ever.