Best striker at the time and one of the consistently scariest finishers of the time, riding a 7 fight win streak (including Randleman, Barnett, Aleks and Coleman), and a 5 fight finish streak faced the GOAT - both established fighters before the match and both in their athletic prime, fighting on one of the best MMA cards ever, at the exact time when the fans wanted to see the fight.
The UFC has never had this, they came close with Cain and JDS I, but not quite.
Greatest MMA fight ever, hands down, no contest, all criteria.