Quite simple, no, not yet
. He is a very remarkable tennis player and on his way to become a 'legend', but for now it's yet too soon. Of course, whatever is called a 'legend' is arbitrary, but I personally put the threshold at about 7-8 GS titles.
Should he be able to keep it going at the current rate of things, he'll be there in about six months.
Perhaps even sooner but I still believe Rafa will take RG.