Holyfield for one (great as he was) has a flawed record at heavyweight imo

Lost to Bowe
Nearly stopped by journeyman cooper
Laboured to wins over geriatrics Foreman and Holmes
Lost to Bowe gain
Lost to Moorer

didn't often have 2 good fights in a row - like I say without doubt a great - and def greatest Cruiser ever, but wouldn't make my top 10 heavies list

just one example