Which boxers had the most perfect technique?

I agree also. Ricardo Lopez is by far the best boxer to imitate if you're goal is to become a phenominally technical boxer-puncher. Trainers should definitely show their fighters tape of the way Ricardo Lopez boxed. He moved great - he never crossed his feet and controlled fights by making his opponent fight at a range that he was most comfortable with. He threw beautiful punches - and he made everything look extremely easy and natural. He also had speed and power that could put his guys away with any punch or series of punches. And he had a great killer instinct that he turned on when he sensed that his opponent was in trouble. I think that a lot of the credit should go to Nacho Beristain. He is a great trainer for technique and all around skills. Look at the fighters that he trains, they all have excellent form and exciting styles. He trained Lopez who is an exceptional fighter that was and is, unfortunately, underrated and unmentioned a lot of the time. He trains the Marquez brothers, Juan Manuel and Rafael, and they also have great technique, with Juan probably being the more talented. He has also trained the up-and-coming Abner Mares, who in my opinion, made great progress with Nacho. (To be fair, I still think that Mares is still improving, even though Nacho is no longer his trainer. I do however think that Nacho contributed a lot to Mares' knowledge of the sport.) Overall, I one-hundred percent agree that Ricardo Lopez had the most impressive technique that I have seen so far. He was a monster and I think that he should definitely get more attention than he does.