Jon Jones does not need to fight again to cement his place as the greatest fighter in history, just look at his fighting career and he basically took on undefeated fighters throughout his career and even Jon Jones promised to stop Stipe Miocic before the championship rounds and with Stipe at 40 years and not fighting for the past two years, it will be a challenge for him against Jon Jones.
Jon Jones hit the top pound for pound ranking after finishing one fight, I was very surprised to find out the latest pound for pound list updates have been updated and it's hard to replace his position unless a fighter can clear him in his next fight, but I'm not sure for Stipe Miocic as he doesn't has the better fighting history than Jon Bones, he lost the heavyweight belt to Francis in his last fight, so Stipe's return won't change anything and if Jon Bones wins again in his next fight then the top pound for pound list position for Jon Jones is undefeated.