King Oedipus

Oedipus as we see him time after time an intelligent , self-confident, ingenious, self-reliant but hot-tempered and too sure about himself. Heis also short-tempered which leads him to commit the first sin , thus fulfilled the first part of the prophecy. But through natural mercy and good will of some people involved in this task; the offspring is safely landed to Polybus, the king of Corinth and was adopted as their son. They met at cross road and as father and son possessed similar temper, the disaster occurs. Again it was he who provoked Teiresias by his uncontrollable temper unfounded accusations which forced him revealwhat otherwise would have remained secret which in term drove him on to accuse Creon, which provoked in its turn J ocasta revealation. It was a coincidence but not an natural one, that laius was on his way from Thebes to Delphi. A curious combination of circumstances together with negative and positive sides of his character bring catastroph. However, excessesive determination is not only the tragic flaw of Oedipus character.

So, we can say that Oedipus positively did contribute to actualizing his tragic end.