Greece is mostly flaming hot and dry right? I went to college with some kids that had lived there and they said Florida was cold by comparison. So... I'd imagine any fruit trees that do well in equatorial regions could do well there, with proper watering etc. Guava maybe?
And, you're welcome! (I don't like loquats either honestly)
we do get some frost in winter. it is hot in summer, and I don't think we have guavas here.