You are not seeing the whole picture here. Fedor? Are you serious? He's the best MMA fighter right now but his boxing isn't anything speacial. From what I've seen he'd get ko'd. He's leaves his hands down, he throws wild wide punches, he just jumps right into range, sometimes he stands square, is very short for a heavywieght, and all the other aspects of boxing we don't know because he dosen't train for boxing alone. If you ever competed or trained in boxing you can spot some talent or others that might have some skill to transfer. The 3 I named have a good base, body type, they train a lot of stand-up, and some basic understanding of boxing. I'm not saying any of them will become a champ in boxing but they can be atleast c level. Varner being the most likely if built up and put in the right fights. He has past experience in boxing. That's so important.