Was/Is still better than anyone on Golovkin's resume. Remember, just before he met Froch, an old broken down Glen Johnson was Lucien Bute's best opponent and Bute barely beat him by decision. :yep
You mustn't of seen that particular fight. So I'd refrain from commenting about it if you thought Bute v Johnson was close.
Kessler is tested against better opposition. If he had success against Joey Cal , he'd have success against Glovkin. I'll tell ya that for free.
So losing to Joe Calzaghe is a career highlight? KO'ing Allan Green, who was KO'd every time he stepped up? Losing to Andre Ward and Carl Froch are highlights? That tells you all you need to know about his career. Very good, solid boxer, but not on GGG's level.