I read your post carefully enough. You talk about differences in Slam counts. For me that is not enough. I look at whole career perspectives. If a player has achieved enough in other aspects of the game then it is irrelevent to me how many Slams he has less than Becker or Edberg. I believe someone like Murray fulfils this criteria, others don't.
No, it's not just about slam count differences. Again, you miss the point. It's the fact that Hewitt and Safin trail Murray, by a smaller slam difference then Murray trails Becker/Edberg. All I'm saying is you gotta be consistent. If Murray is an ATG, then so are Hewitt/Safin. If you draw the magic line for ATG right after Murray, that shows real bias, not good.