When people think of counter-punchers, they usually think of patient, low workrate guys who wait for their opponent to attack first. But, like with everything in boxing, there's more than one way to do something. Who were some fighters who were aggressive counter-punchers? Prime Tyson Floyd in his younger years Inoue Salvador Sanchez
Jose Napoles Salvador Sanchez Dwight Muhammad Qawi Mike McCallum Orlando Canizales Juan Manuel Marquez
While he perhaps wasn't as active/high volume as some of the other names mentioned, James Toney was a lethal counter-puncher.
You perfectly described Juan Manuel Marquez as he was mostly backing away throughout the fight while occasionally jabbing, low punch count who fought as a prey but rarely the predator & then appeared shocked at why he didn't win the decision, If only he went ahead & unloaded more he would have had more success in spots but that might of left him in more of a vulnerable state, either way he could have been more destructive because when he unload his combinations it was lethal at times, a shame really.