That would be very touristy places. It's possible. I've been to idyllic beaches in New Zealand at the height of summer all by myself or just with my family, not one other person. Heaven 🥰 There will definitely be other places like that. ☺️
Discussion
Of course there are. You can count them in hundrends if not thousands only in Greece. And i mean fabulous places. But access might be an issue. Sometimes only by boat, sometimes only via a narrow path next to a dangerous cliff etc.