They need not be heavyweights themself, i.e. you can include Greb or Tunney if you like. Who were the 10 best possible title challengers during this period, in your opinion?
You only listed nine--I would add Firpo. He had an impressive run of victories, including knockouts of Willard, Brennan , and Weinert.
Jack Renault is a bit of an enigma for me. I've never seen him. Can anyone tell me what his style was, weaknesses,strengths etc? Fogey? DMT?