From a competitive standpoint - YES. Murray belongs in the top 4.
From a career standpoint - NOT YET. Not yet meaning he will. It's just a matter of time before he collects more slams.
I think the OP meant to say from a competitive standpoint.
But if he meant to to say from a competitive standpoint, then why would no. of Slams matter? I mean, then we should only look at level of play and partially their H2Hs, not # of Slams... But the # of Slams is contained in the thread title, so I would say it's the other way around. Or he just wanted to troll, that's the 3rd option...