Not op, but my main recommendation would be to visit greek in spring or autumn and not in summer, unless you really like it hot. Spring can be more wet, so late autumn, when most of the tourists are gone, but while it is still warm enough, would be my recommendation.

And Daemonia Nymphe for example would a greek band, that tries to reproduce the spirit of ancient greek music (not 1:1 reconstruction, but with authentic instruments).

https://en.wikipedia.org/wiki/Daemonia_Nymphe

https://www.youtube.com/watch?v=JRxEXasEDj8

And I also can recommend crete. I camped wild next to an old temples there, which was otherwise occupied by goats. Interesting experience.