Golovkin can KO anyone, he would stop primitive no defense having Froch no doubt. Abraham ain't **** compared to GGG, GGG hits harder than Povetkin according to valid sources GGG is a beast and the most powerful puncher from 154 to 168 quoting the words from one of his cruiserweight sparring partners ¨nobody below 175lb dares to spar with him! his power is out of this world!!¨
Goodboy, is an average size middleweight. Carl, would be too big for him and would beat him. He would be the one knocking him out.
Golovkin easily has the power to stop Froch, surely. But can he get in close enough and without getting hit against Froch's respectable reach when he decides to jab and box like against Abraham? The size, strength and reach of Froch makes it hard for golovkin to impose his usual advantage in strength and pressure making it hard for him to land his power clearly. However if Froch gets careless and sloppy (as he does) when he opens up he could quite probably end up taking a short nap.
Taylor is a very underrated puncher and hugely explosive. No shame in getting dropped by him. Pavlik hit the deck as well when they fought. Golovkin has nice thud in his punches, and catches you with a lot of leather, but I'd be skeptical if he could do the business against Froch, unless Froch is badly faded or gets hit with a silly shot when he's not expecting it. Of course if Golovkin gets a free shot at Froch that's another matter. But I doubt that's what you meant.