1. Marouane Chamakh
By and large one of the single worst strikers the Premier League has ever seen. He arrived from Bordeaux in 2010 after spending 8 years at the French club, making 230 appearances. Despite managing to score 56 goals there, he apparently left his shooting boots behind when he packed his bags for London. Since arriving at Arsenal, he has managed just 8 goals, and you're more likely to see Sir Alex Ferguson without a piece of gum in his mouth than you are to see Chamakh find the back of the net. He didn't feature in a single Premier League game for Arsenal this season.
Where is he now? He was eventually loaned to West Ham United. Permanently, probably.