Three options (Toure brothers - Kolo and Yaya, plus Drogba) are Ivorian players from the 2000s-2010s era, while Adebayor is Togolese. The pattern could be nationality (all but Adebayor are Ivory Coast nationals) or perhaps playing career patterns. All four were African strikers/midfielders prominent in European leagues. Drogba is the most iconic Ivorian, so 'Adebayor as odd one' makes sense by nationality.