The history of HW boxing has seen times when giants seemed to dominate interspersed with times when potential CWs and LHWs have dominated. I'm sure that people in the early part of the 20th century figured that after Jim Jeffries, Jack Johnson and Jess Willard that the division belonged to giants forever. Then Jack Dempsey and Gene Tunney came along. And I'm sure people 20 years later who were watching Max Baer fight Primo Carnera for the title figured that was it for smaller guys in the HW division, but within a couple of decades you had Marciano and Patterson. It certainly looks like the division has been turned over to giants again, with Lewis, the Klitchkos and maybe now Joshua holding the title for a while. Maybe this will be different, but if you remove the Klits and Lewis, then the top guys of this millennia are, once again, smaller like Holyfield (former CW), Ruiz (former CW), Byrd (future LHW), Haye (former CW) and Povetkin (could probably make CW).