Kasparov.
Carlsen and others will dethrone him, there is no doubt about it, but over 20 years of a reign with an iron first require a huge amount of respect, specially when all the prep was with the grey matter engine and not a silicon one, and we have to wait a proper amount of time to update the ladder, which technically already changed, but out of respect hasnt.
Some champion that played 0 games as one, while a great player, ranks way low in my list.
Carlsen and others will dethrone him, there is no doubt about it, but over 20 years of a reign with an iron first require a huge amount of respect, specially when all the prep was with the grey matter engine and not a silicon one, and we have to wait a proper amount of time to update the ladder, which technically already changed, but out of respect hasnt.
Some champion that played 0 games as one, while a great player, ranks way low in my list.