Is there a better CF inside the box? His composure, height and acrobatics gives him an extra dimension that strikers like Suarez, Aguero and Lewandowski lack. These are all great finishers who will give you tons of goals, but inside the box, Zlatan is something special. I also don't think that there is a center forward out there with a better long-shot.
There are only 3-4 center forwards right now that can be compared to Zlatan, and that is Suarez, Augero, Benzema and Lewandowski. Suarez is obviously better than Zlatan, but I'm not so sure about the other 3. Regardless, they all have one thing in common: we're never gonna get them. TLDR; Zlatan is the best CF we can get. It's not a long-term signing, and we definitely need an AM/winger(like Griezmann) as well. But there shouldn't be any doubt that Zlatan is a signing of epic proportions.