Which fighters legacy was cemented relatively early in their career?

I know Mike Tyson as pretty much a legend before he went to prison.
Duran pretty much was even before he started fighting the other Kings
I'd say Holmes also was cemented and he still kept fighting for long past his expiration date
But who else?

 

Henry Armstrong was 26 years old when he held the featherweight …Lightweight…and welterweight championship of the world….and he already fought the middleweight champion to a draw

 

Wilfred Benitez when he beat Antonio Cervantes at age 17 and Carlos Palomino at age 20.

Salvador Sanchez when he beat Wilfredo Gomez at age 22.

 

Joe Frazier …it was kind of all downhill after the fight of the century…wasn’t it

 

Les Darcy comes to mind, beating Chip, Clabby, McGoorty, etc... all before 21.

 

Lomachenko’s best win was in his third official pro fight.

 

Salvador Sanchez

 

Ray Leonard fought 32 times between 1977 and 1981, beating Thomas Hearns, Roberto Duran, Wilfred Benitez, Armando Muniz, and Ayoub Kalule. If he had never fought again beyond that he’d still be a super star ATG.

 

Masao Ohba's legacy was sealed at a young age as well when he passed away at age 23 having beaten fighters such as Betulio Gonzalez, Susumu Hanagata, and Chartchai Chionoi.

 

Jimmy Mclarnin stands alone.

By the age of just SEVENTEEN Mclarnin had beaten FOUR HOFers.. Pancho Villa, Fidel Labarba, Jackie Fields & Bud Taylor. Hed also drawn with HOFer Memphis Pal Moore..

Who else can claim that? Unreal.

 

Jackie Berg? World champion, with wins against Tony Canzoneri, Kid Chocolate and Mushy Callahan, all by the age of 21.

 

Joe Louis was the GOAT at the end of the 1930s.

 

Francis Ngannou.

 

He and Fury should rematch.

I think Francis turns the trick again and even better.

He is Tyson’s bogeyman.

 

Ngannous nearly 40 his time is over