#1 Ronald Koeman - 253 goals

Ronald Koeman's goal-scoring statistics truly boggle the mind - forget defenders, strikers and attacking midfielders would kill to have scored the number of goals that this former Dutch international did.
Netting an astonishing 253 goals in his days a sweeper centre back, Koeman was an anomaly in the way he consistently scored goals as a defender. The gap between him and Passarella is almost 80 goals, which is way more than the number of goals a defender in today's game can hope to score in their career.
Playing for the likes of Barcelona and Ajax, the current Netherlands manager was known for his vision and finishing. An accurate penalty kick taker, Koeman was also very good at taking free-kicks - his most important strike was his extra-time free-kick against Sampdoria that handed Barcelona their first-ever European Cup in 1992. Koeman once scored 26 goals in a single season for PSV, while scoring 19 goals twice in two different seasons for Barcelona.
As far as unbreakable records in the game go, Koeman's goal tally is one of those which no defender might ever match.