the Ghidorah. 3 headed, mythical, destructive, feared... Clearly what "GGG" (also known as triple Ghi) Golovkin is like
JMM is most like the mongoose. He'll let the adversary attack first, then counter with deadly accuracy. I can't think of one for Cotto. Gatti was said to have had the heart of a lion, I always thought he attacked like a pit bull, oblivious to the punches coming back at him.
Tell your neighbor to quit smacking LMW's around if he can't get what he wants :yep Unless you're around that weight yourself. Then it might be a bad idea.
Any felin. Felins are unpaired in fighting. Go watch some cat fights videos on youtube, you don't even understand what appens, and in slow motion it seems almost a boxing match, sometimes. They are hard chinned, too.