If you don't want to hear about Mykonos, Naxos, Santorini, Crete or other classic Greek islands, the Greek newspaper Kathimerini English Edition recently published an article about some off-the-beaten-track destinations.
It's here:
https://www.ekathimerini.com/society/1233189/10-lesser-known-greek-islands-to-explore-in-2024/