1). Suarez, his last season at Liverpool is easily one of the best seasons any player has had in Premier League history. He showed that he is not only a goalscoring machine but a great playmaker. He does most everything at a world class level. Doing very well at Barcelona even whilst not having the team centered around him.
2). Aguero, simply amazing player. His pace and power are unreal and his finishing ability is as good as any I have seen in a long time. When fit I believe he is every bit as good as Suarez. However, keeping fit is a problem for him which is why I give the nod to Suarez.
3). Costa, was gutted when he went to Chelsea. Has proved to be a massive success so far in the Premier League. He might not be as agile or tricky as some others but his power and positioning is unbelievable and he is also pretty quick himself when he gets going. Also poses an aerial threat.
4). Benzema, criminally underappreciated player by a lot of people I believe. I've been praying for Wenger to go after this guy season after season. His goalscoring may not be at the level of the others on this list (although he is still prolific) but there is something about Benzema. The way in which he creates space for teammates is amazing, from this list I feel like his movement is easily the best.
5). Lewandowski, one of the most complete strikers in the world. He hasn't been quite as good for Bayern as he was Dortmund. But, he has shown over the years that he is one of the best. Great finisher, always seems to be in a good position, can provide an aerial threat and is underrated as a playmaker in my opinion.
2 or 3 seasons ago my list would have been different. Van Persie definitely would've been in there, as would Falcao, Ibrahimovic and possibly Cavani. Although I have no idea how I would rank them, would kill for any of them at Arsenal.