You'd have to really not like football to think Drogba was better than Aguero, imho. An absolute monster at his peak, and vital to Chelsea, but quality-wise nowhere near. Can't disagree with anyone else on the list, but if we're having Lampard and Gerrard in there you've probably got to have Toure.
Top three of the modern era for me would be Bergkamp, Zola and Silva. For me absolute skill usurps power, strength, pace, etc, and those three had/have a particular grace about them on and off the pitch.