"They say greatness is defined by how you compete in your own era." That's good to know. Apparently, all eras are equal. Always believe what "they say". Don't believe your own eyes.
Good to know Johnson and Ali are both in his Top 20 though. Which means that he rates them fairly; in his opinion.
Anyway, we have gone on long enough with this. Obviously people have vastly different opinions of how good he was. Let the good Doctor have the last word if he wants.