Nordhavn is not a city, though, it's a district. But IMO it is exactly what is needed. All the basics within 10mins and great culture no more than half an hour away. Lots of Danish cities are like that though. I currently live in Aalborg. When I lived in one of the districts furthest away from the city center I could walk 10mins to everything; supermarkets, barber, pizzerias, a sandwich place, a café, a doctor and a dentist. Primary school, daycare and the like was also within that zone if I needed it. And it is all connected with an intricate bike and walking pathway system
If need be and I wanted to go to the cinema or go to town and drink busses took me there in about half an hour several times an hour, even at night.
I kinda miss it though, but I decided to move to the city center where everything is within 10mins.