Ok so here:
I disagree with s1mple and coldzera.
s1mple can't be in top5, if he is anywhere he is around #9-10 , this is about Greatness, which means - you need to be very good skill-wise (which is what s1mple is) but you also need a lot of achievements, not only MVPs but tournament wins and probably a major tbh.
As for cold - I'd say he is in the top3/5 but he just isn't good enough skill-wise to be nr1., most of his stats were cause his team was doing good and cause TACO supported him a lot. Now that FalleN and fer aren't that good and TACO isn't in the team he is nowhere to be seen.
Also, I do think GTR should be #3 probably or #4, and with that, the game isn't really at a point where we can do these lists, every few weeks something changes and every few months a new team starts rising, some start going down.