[SmG Phoenix]

Here's the thing, currently, from the recent movies of DBZ, we can calculate Goku's strength and endurance, but the the problem is that to pit it against One punch man is impossible. We do not know One punch man's full strength because he has never ever had to shown it.
The only comparison is that Boros is probably around the skill of Frieza since both are known to have conquered and destroyed galaxies. However, when Goku vsed Frieza he almost lost, however, One punch Man only threw one 'serious' punch to 'make the match worthwhile' to the enemy.
From the visuals, that punch had enough air pressure to part the clouds for around the distance of 1/4 of the earth. I probs will do some calculation later to determine how much pressure was generated from the punch. So we know, One punch man could probably defeat Super Saiyan Goku with ease, but with the current Goku, not sure.
Again is comes down to one has a limit, the other doesn't at the moment. This is almost like that Superman vs Goku thing. One can break through limits while the other seems to only needs to be as strong as required.
Superman shares quite a few parallels to One punch man, both are god amongst insects.

But can Ryner Lute actually see someone like One Punch Man or Negi Springfield who can both move at near light speed, all you're seeing is afterimages.