Greek politicians who may be on an inexorable slide toward an EU exit have been less vocal about their models for a post-EU future.

It's not difficult to see why — most of the alternatives don't look that attractive. Here's a look at six paths other countries have taken that could open up to Greece if it leaves the European Union.

Greeks won't want to hear this, but their historic rival may offer a best-case scenario. Turkey has thrived outside the European Union. Growth rolled along at 5 percent a year for a decade before 2012. It has since slowed to an average of 3 percent, still much better than the euro zone overall, which contracted over the same period. Per person, it's now richer than some EU members. Turkey has built its success on a stable currency, tight finances and pro-business politics to attract investment — just the sort of thing the European Union has been unsuccessfully asking Greece's far-left government to implement over the past six months.