I second the Seleukids out of the reasons pointed out previously.

However, let's face it, none of them was really successful military- and politics-wise. Yes, at a time, but they did not last very long. Their success lies in the cultural heritage that Alexander's cunning deeds have sewed in the East and lasted up until the Byzantine Era. More so, the Hellenistic monarchies are an example for how difficult it is for a kingdom to survive when your power depends on a very small, unreplaceable ressource of men. Perhaps they failed out of the same reasons that Sparta owes its failure to, though they were diametrically different.