I am massively hesitant about the tree. So far, the hedge is mostly colorful, next to the leaf-sensitive neighbor with evergreen Bergilex, Portuguese laurel cherry, and privet. Perennials are slowly coming along as well.
But a tree would have to go "right in the middle," and since this year we can actually use the garden as such for the first time, I still can't quite imagine where we would like it. And which one. My dream, a plum tree, does attract wasps quite a bit. :-(
Espalier fruit trees my boyfriend does not want. Yes, one. You have to start somewhere. But what will definitely never be included: an apple tree. My personal anti-fruit.