Most aesthetically pleasing punching technique?

Kovalev.
Tua.
Tommy Morrison.
Mike Tyson.
GGG.
Canelo.
Holyfield.

 

Mike Tyson

 

Mike Tyson
Joe Louis
Lomachenko
Golovkin
Beterbiev
Foreman
Liston
Mayweather (peak around Gatti era)
RJJ
Pac
James Toney

You could visually appreciate these guys and sit back and saw "wow, that guy is a BEAST"

 

Jorge Linares.

 

Thomas Hearns. He would keep you at bay with the jab for a while, then flip the switch and go off on an apponent, usually ending with them looking like the end of the Cuavas or Duran fight.

 

Flouyd,
JMM,
Trinidad

I like the way Bud and Shakur punch for the modern guys.

 

GGG's jab, thing of beauty

 

Lewis
Bivol
Gerry Penalosa
GGG
Marquez
Old man Foreman
Prime Pac
Mosley

 

Unless you are referring to Pac's one, two combos, he really wasn't a combination puncher. It wasn't until the latter part of his career did he incorporate somewhat of a right hook aka Manilla Ice. Even then he looked awkward throwing it. He certainly wasn't one of the smoothest combo punchers in the game.

 

Salvador Sanchez
Jorge Linares

 

Humberto Soto put punches together beautifully.
Watching Chocolatito in full flow is something to behold.

 

Golovkin's downward shot (downwardcut or reverse uppercut???). It's effective for resolving stubborn guards. It lands on opponent's skull from above like a lightning.

 

Chocolatito's and Loma's punch combos were so beautiful to watch. Probably the best combination punchers in boxing right now. Followed by Inoue and Bivol.

Mark Too Sharp Johnson also put together some great combinations as well.

 

Always liked watching Gerald McClellan's punching technique, especially when he punches to the body. Man was a monster, just a devastating puncher.