How would you grade these fighters in terms of skills NOT legacy

Mayweather, Pacquiao, Tyson, Leonard and Ali are all A's; Chavez, Cotto, Hopkins and Khan get a B (although Khan has the potential to be an A).

Floyd Mayweather Jr-A Manny Pacquiao-B Mike Tyson yes Prime Mike-B Muhammed Ali-B+ Sugar Ray leonard-A- Amir Khan-B- Miguel Cotto-B- Julio Cesar Chavez-B+ Bernard hopkins-A

Floyd Mayweather Jr - A Manny Pacquiao - B Mike Tyson - B Muhammed Ali - A- Sugar Ray leonard - A Amir Khan - B Miguel Cotto - B Julio Cesar Chavez - B Bernard hopkins - B+

this is going to be a hard answered thread because you'll have arguments saying skill and legacy go hand and hand--what a fighter does to one fighter, he may not be able to do to another seeing how that other fighter is better overall--- just a little heads up for you- Floyd Mayweather Jr-A+ Manny Pacquiao-B Mike Tyson yes Prime Mike-B+ Muhammed Ali-A Sugar Ray leonard-A Amir Khan-B/close to B- Miguel Cotto-B Julio Cesar Chavez-A- Bernard hopkins-A

Floyd Mayweather: A- Manny Pacquiao: B Sugar Ray Leonard: A Muhammed Ali: A Amir Khan: B- Miguel Cotto: B Julio Cesar Chavez: B+ Bernard Hopkins: B+ Mike Tyson: B

in Grading system ... A+, a, a etc

Floyd Mayweather Jr - 1 Manny Pacquiao - 5 Mike Tyson yes Prime Mike - 7 Muhammed Ali - 3 Sugar Ray leonard - 4 Amir Khan - 6 Miguel Cotto - 8 Julio Cesar Chavez - 9 Bernard hopkins - 2 Pure boxing skill, not athleticism.

leonard mayweather hopkins ali pacquiao tyson chavez cotto kahn