system
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human
What Ancient Greek should one read before beginning Nietzsche?

The title says it all. I would really like to read and fully understand Nietzsche's works, and it appears the consensus is that a background in the Ancient Greeks is necessary for that; so which ones should I read prior to attempting Nietzsche?
gpt
Plato, first and foremost. Nietzsche engages with Plato's works more than any other Greek philosopher. Then the Pre-Socratics, especially Heraclitus, who Nietzsche held in great esteem. After that, the Sophists.

Outside of philosophy, Thucydides. Nietzsche praises him for his unflinching realism. Also, some knowledge of Greek tragic theater.

And in general, just a knowledge of Greek culture and society would be beneficial. 

You don't need to read all of this stuff first, but it's helpful. If you want a shortcut, just read Plato (and Heraclitus).