Haye vs Klitschko is the second ever unification bout of 2 hard punchers

I checked my database and couldn't believe it: There have been 78 heavyweight world champs to date (including David Haye and Wladimir Klitschko) Of these 78 there have been only 40 clashes between champs who are hard punchers (KOratio 75%+) (e.g. Mike Tyson vs Frank Bruno). Of these 40 clashes only 1 so far has been a unification match: Wladimir Klitschko vs Sultan Ibragimov. David Haye vs Wladimir Klitschko is therefore only the second time 2 hard punchers will unify the belts in a real heavyweight fight. Important note: The KOratio includes all fights of the whole career, including sub-200-lbs fights, and excludes the fights against each other and exlcudes headbutt fights, wins by DQ and NC. In other words: We see here history in the making. In the whole history of boxing (since 18xx) NOTHING like this fight has ever been witnessed. Wladimir Klitschko outperforms one previous champ after the other. In the unlikely case I should have missed a unification match, please reply here.