#6 Diego Costa
The hard-hitting striker who now plays for Atletico Madrid was once a Chelsea player who donned the famous number 9 jersey and scored lots of goals on weekly basis. Diego Costa remains as one of the great premier league strikers for Chelsea and it was his goals that helped the north London outfit in winning the premier league in 2015 and 2017 with his scoring rate proving to be the deciding factor.
Often known for his bad temper, there is no denying in the fact that Diego Costa gave the premier league defenses a hard time during his stay with the blues. During his 3-year spell with the blues, Costa scored many important goals which took Chelsea over the line.
The blues tried to replace costa by signing another Spanish international, Alvaro Morata but it is fair to say that Morata couldn't fill in the boots. Costa provided a dynamic approach to the Chelsea set-up and his sheer will on the field helped him become the player he is.
Though Costa stayed in the premier league for just 3 seasons, he won it 2 times and succeeded to entertain everyone.