From what I've read it's probably Pep.But in the modern game,Ricardo Lopez was,for me anyway,a real technician.As was latter day Barrera and Winky. JMM,Floyd,Hopkins and Toney are the most obvious choices.
Floyd jr. He is a walking highlight reel. Great offense, defense, boxing IQ, and versatiliy. Multi-division champ with just average power but still dominates everyone.
I mean how many ATGs can you actually say that they can do it all like Floyd Jr? Even his workouts are jaw dropping.
burley, langford, pep, mayweather, sweet pea, benny leonard, benitez, toney, lopez, charles hard to pick a #1
Great list I would add Sanchez, Barrera, and Monzon. And I say Barrera because post Jr Jones he developed that great counterpunching style he later used on Hamed. Many times they'd just flat out take worthy opponents to school. But of the todays fighters I gotta say Floyd, but Rigondeaux has highly impressed me. The feints, triple jabs upstairs to confuse and then land that deadly bodyshot, etc he's actually thinking before he throws. He's actually using his brain to outsmart and confuse his opponent. Technicians are a rare breed.