Hardest Puncher In Each Weightclass ?

But without could he not create much power to land on the opponent, because of his poor technique (he looked horrible on films, like a kangaroo).

He was possible (likely) the first well known (infamous) cheat in boxing history. Did it more than one century before Margarito (a little bit less until Thobela).

 

Heavyweight: Rocky Marciano
Cruiserweight: Yoan Pablo Hernandez (can be also named Gurov and Aleksejew)
Light-Heavyweight: Archie Moore (can be mentioned Adonis Stevenson and Michael Moorer)
Super-Middleweight: Victor Oganov (there come next Danny Green, Rudy Markussen, James Butler)
Middleweight: Gerald McCleallan (Ketchel can be named too)
Light-Middleweight: Julian Jackson
Welterweight: Thomas Hearns (ahead of Cuevas and Trinidad)
Light-Welterweight: Randall Bailey (next to him come Torres and Tszyu)
Lightweight: Shane Mosley
Super-Featherweight: Edwin Valero (besides Freitas and Uchiyama)
Featherweight: Naseem Hamed
Super-Bantamweight: Wilfredo Gomez (there can be Juan Manuel Lopez also named)
Bantamweight: Carlos Zarate (besides Alfonso Zamora and Veraphol Sahaprom)
Super-Flyweight: Khaosai Galaxy
Flyweight: Jimmy Wilde (also Pancho Villa could be mentioned)
Light-Flyweight: Michael Cabajal (Giovanni Segura could be high rated too, even Brian Viloria and Luìs Concepcion)
Strawweight: Roman Gonzalez (besides Ioka)

 

Show evidences.

 

All great choices laid out here, guys. Wouldn't dispute much. However, at 140 for me it's a slam-dunk. Carlos Hernandez far and away my top choice.

 

There are very likely indications (more than for Antonio Margarito or Dingaan Thobela); like he possible said he will use it and Jeffries team didn't care, who replied: "let him do it". Also had who no reason to accuse this, as he won anyway. Just as the Improvement with 39 at the end of the career.
It's also that he could not develop so mucn power with such crude punching-technique, it looks similar as an ape wearing gloves.
So you can read the report about the suspicion on Boxrec or in the book of Jeffries.

 

That's one fight, you have not even one anecdote about different fights. Fitzsimmons wasn't known as a murderous puncher because of his rematch with Jeffries.

 

But if he did it in this, it is very likely that he used to do it in others, as important, especially when he was around his peak like for the Middleweight crown and against Corbett, who had him on the verge of defeat.
As Margarito isn't even proven in one fight, because it was found out before it was used against Mosley.
Even if it happened just once (which is unlikely), it is actual attempt murder, as boxing is very dangerous, even without illegal help. That might be worse than doping.

 

If is a big word, because you have no proofs. Fitz gloves were examined many times throughout his career and he was never disqualified. Stop talking nonsense

 

You know at which time he was active? Did you show any proof for any examination of his gloves? You are the one who is gipering nonsense; you have absolute no clue about this matter!

I showed you two references which are more evidence than anything you burbt here out...
There was a reasn why his assistants didn't let inspect the team of Jeffries the gloves and threw these to the spectators, most likely.
Well it might be hard for you to get your hero disturb, but you should notice he was a fraud and live with that.