Gets down to splitting hairs between the likes of Pirlo, Blanchflower and Scholes even though those rankings has Scholes at the bottom of the three. I don't really think there is a pass that Pirlo would see and execute that Blanchflower and Scholes wouldn't. I think it becomes more about who can find the opportunity to make the pass the most often.
Only included people in the same role, deep lying playmakers - type. The passing you use as an attacking midifelder or second striker(In Haynes case) just cant be compared. Take Ronaldinho, he had one of the most penetrative passing ranges ever when he got near the box but of course his metronome passing wasn't close to someone like Scholes or Pirlo and his long ranged passes from deep couldn't compare either.
The further forward you get the more creativity, vision and dribbling becomes important. As a DLP there is a much bigger emphasize on just the quality of your passing. Everybody will see RVP making the run, the question is who can find that tiny 2 meter box of space that will create a chance - from 45 meters away.
Scholes was one of the greatest passers ever from deep, but as a second striker or AM I would never put him above Iniesta, Ronaldinho, Zidane etc etc. But they couldn't step down and do his job from a DLP role as good as he did it.