True one punch guys

[SaltyBacon]

daniel ponce de leon

[RozzySean]

Current:

Abraham is head and shoulders the best.
Froch has good 1 punch power
Either Klitschko
Arreola - No pretty, but he can stop you with either hand, one shot.
Vic Darcincian - obvious
Pavlik - IN a way he does need to wear his man down, but he has one punch power. He isn't the fastest, so he needs to hypnotize you with the jab before he drops his "real" right. He shows early, then let's it go once he swells the eyes with the jab and they can't see it so well.
Ding-a-Ling Man

Recent History:

O'Neil Bell - will wait and do nothing for 8 rounds, gets an opening, then, lights out.
Tito - goes without saying
Prime Herbie Hide
Julian Jackson
Hearns
Lennox
Tua
Corrie Sanders
George Foreman 2.0
Terry Norris
Micky Ward - best one-punch body puncher, ever.
Kostya Tszyu
Hamed

Classic History:
Shavers
Monzon
Bob Foster
Rocky Marciano
Ray Robinson, especially at WW
Henry Armstrong
Jack Dempsey
Ketchell
Hurrican Carter - believe it or not, he can Monzon were the only two fighters to KO Emile Griffith. Slick boxers gave him problems, but he was one of the hardest.

[eagle]

Current:

Abraham is head and shoulders the best.
Froch has good 1 punch power
Either Klitschko
Arreola - No pretty, but he can stop you with either hand, one shot.
Vic Darcincian - obvious
Pavlik - IN a way he does need to wear his man down, but he has one punch power. He isn't the fastest, so he needs to hypnotize you with the jab before he drops his "real" right. He shows early, then let's it go once he swells the eyes with the jab and they can't see it so well.
Ding-a-Ling Man

Recent History:

O'Neil Bell - will wait and do nothing for 8 rounds, gets an opening, then, lights out.
Tito - goes without saying
Prime Herbie Hide
Julian Jackson
Hearns
Lennox
Tua
Corrie Sanders
George Foreman 2.0
Terry Norris
Micky Ward - best one-punch body puncher, ever.
Kostya Tszyu
Hamed

Classic History:
Shavers
Monzon
Bob Foster
Rocky Marciano
Ray Robinson, especially at WW
Henry Armstrong
Jack Dempsey
Ketchell
Hurrican Carter - believe it or not, he can Monzon were the only two fighters to KO Emile Griffith. Slick boxers gave him problems, but he was one of the hardest.

Good list mate. I'd probably add in Haye and Bute for Current day fighters and Maybe the Klits. I believe they all punch a bit harder P4P than Froch who i'd say is on a similiar level powerwise to Danny Green or Adamek.
Good call on the classic fghters tho.

[The Rocket]

Diaconu, Bailey, Urango, Miranda, the Klitschko brothers, A. Abraham.
Bute left hook against Andrade was nice..

[eagleskins]

Right now, Pavlik, Wlad, Abraham, Gamboa in no particular order.

[Hulk]

Nigel Benn could crack pretty hard with a single punch.

Darchinyan is a big hitter nowadays as well, despite looking like a wild goose.

[TheBranMan]

Darchinyan and Gamboa are no-brainers within the ranks of smaller guys. Also, Valero has looked very promising so far, although I'll have to see how he holds up against the skill-set of DeMarco before I make any finite decisions about him, he looks kind of sloppy.

Also, I could have missed something... but uhh.. Pacquiao? Shit, he may have chemicals pumping through his veins but we all saw the one punch that sent Hatton off with the faeries.