Impossible to know unless you were a trainer in their first gym Must have been plenty of champs who were absolute garbage & plenty of none champs who were naturals.
No such thing as talent. You are born with whatever genetics and physical attributes you inherited from your parents. The rest comes down to; hard work dedication a commitment to learning application.
Among the active ones, Canelo. No doubt. Had I trained canelo he would have been a champion anyway. Reinoso has improved, but he was very well known to be a complete crap of a trainer.
Muhammad Ali and Rjj are the right answers, especially Ali Ali done a lot of things you should not do, yet he has the greatest resume in heavyweight history. He's just a freak athlete with the ultimate winners mentality He might look like model, but for me Ali was just born to box Rjj is even freakier again when it comes to speed and reflexes. Like Ali, it wouldn't matter who coached him, he was going to be a great fighter Of course there are others, but these 2 stand out for I think Mike also deserves a shout. He was found at 13 and 7 short years later he is youngest man to win a title at heavyweight, despite being around 5'10 or a little more