I mean, I would argue to be the greatest of all time you would have to be the greatest at some point. If you are familiar with league esports, Faker is considered the greatest of all time in league but that's because he truly was the greatest at points in his career. Even in recent history, he basically solo carried T1 through their two recent worlds runs in the JDG series and in the BLG series. Chronicle has been consistently really good for a while, but he has never been considered the greatest player at any point, as even within his own team he is always outshined. He hasn't had the peak that players like Faker, Yay, Demon1, Aspas, and more have had. Being good forever will never make you the greatest forever. Not to say that he isn't one of the best, but he has never been the best at any point, just really damn good consistently.