* Έλληνας άντρας (Éllinas ándras): This is the most literal translation. Έλληνας (Éllinas) means "Greek man" (literally, "Greek male"), and άντρας (ándras) means "man." This is a safe and widely understood option.
* Έλληνας (Éllinas): This word alone can mean "Greek man." The context usually makes it clear that you're referring to a male. This is more concise.
The choice between these two depends on whether you want to explicitly state "man" or if the context already makes it clear.