Uh, it is all American. You might want to take a look at some boxing history. Tyson? You can't be serious. Patterson doesn't deserve to be on the list either.
For the most part of the last 100 years, the British were the only Europeans that gave a crap about boxing, and for the most part of the last 100 years half of Europe (the better half) was not allowed to compete professionally.
Well 2 locks in Willie Pep and Harry Greb you can also make a case for Benny Leonard. Mickey Walker is right outside the top 10.
American is anyone born and raised here regardless of racial background. American Indians and Mexicans are the true natives though.
Europeans? Only one: Bob Fitzsimmons. He has a case to rank very high, even number one though. White Americans? Greb, Walker, Leonard, Ross are fighters that are inside of Top10 lists very often. Others would be Canzoneri, McLarnin and Marciano although their arguments are weaker. Henry Armstrong was as much white as black or native American. And he is a lock for the Top10, maybe even number one.
Because certain liberals though Black wanst politically correct,so they came up with African American. Anyways terms like Mex/Amer Ital/American etc etc are just a way for one to identify with their ancestry.
Well Puerto Rico is also part of the US, but you dont hear PRs from the Island calling themselves American.