Of course not! Djokovic is definitely an all-time great, but in my opinion, still one tier below the Agassi-McEnroe-Connors-Becker level.
Djokovic will never be in the discussion for GOAT, even Nadal, as great of a player he is, is not in the GOAT debate. It is mainly between Laver, Federer, and Sampras, with Federer having the edge. Djokovic will need to win 10 more Grand Slams, 10 more masters, win more slams besides hardcourt. This will never happen.
Sampras? Don't get me wrong, he is obviuosly very high on the all time list, I just don't see how he could compare favourably with Federer. Laver did something else, more difficult to compare. Federer and Sampras did much the same thing, only Fed has done more of it, so comparison is easy. Fed has more slams, more WTFs, more Masters, more titles, more weeks as #1, more places won (FO), better stretches (like 10 straight finals, 65 grass matches etc.) etc. Pete has a sixth year-end #1, otherwise he is beat or equaled everywhere. Or did I forget anything?