I'd actually put Suarez in a bracket all in his own when it comes to strikers, there's no one that can do what he does except Messi IMO. Putting aside his goal scoring record he has the other side of the game down to a science he can create chances, link play and assist effortlessly. More goals than games (40) in La Liga plus 16 assists? Astounding.
He's a true complete striker and for me deserves the Ballon d'Or.
Higauin is right there with Lewandowski, Aguero, Benzema et al. You can't really put Aguero in a higher bracket because Aguero isn't really complete either he's a pure goal scorer, I think Higuain is a little more well rounded in comparison though.