JBH gave a long list of individual services. I think you're looking for something different?
In general, to support life, you need food, shelter, water, air, power and transport.
Power
For power and sufficiency, cover everything you can with solar panels. You'll probably need some power plants as well, so people have power at night, and because the panels might't be able to supply enough, depending on your aliens' power demands. Nuclear would be best, but they might have fusion which would make electricity VERY cheap. Of course, you'll plan your city so that high rise buildings aren't blocking solar panels too much.
You can make use of circumstantial power sources, like hydroelectric and the like, as ideally you will build cities next to such useful resources.
Food
This one is tricky, and depends on your tech. If they do have a lot of excess power, due to fusion and nuclear, you could potentially grow everything in plant factories in the city, which has huge potential for sufficiency and health, due to their minimal use of water and pesticides. Even then, generally it's cheaper to grow stuff in massive fields, since you can rely on the free energy of the sun and rain, so your aliens might want to consider traditional farming as well.
You could theoretically cover the roofs of buildings with vertical farms, which maximize sunlight and water use, though that could reduce the surface you have for solar panel arrays, so your people would need to balance out their needs carefully.
Transport
People need to be able to get around your city to fulfill their needs, or else all the services are pointless. You'll also want effective means of delivery.
You mentioned a design based off a village where you can walk to everything... and that's the basic model for European cities. Denmark has almost half the cars per capita of the US, with the UK and France only having a little more. These cities were made long before motor transport, so they were designed with walking distances in mind, and they developed good public transport systems.
In this case, your public transport might largely be trams, trains, and driverless cars. The latter could just be called the same as an Uber. You might also have drone copter cars, at this point, which would be more expensive and dangerous, but still a reasonable possibility.
And speaking of drones, they'd likely replace postmen for the majority of deliveries. If you have fusion power, you can basically make everything electric and cheap.
For long distance transport, you will need trucks and trains. Again, with fusion, everything is electric, so long as you have enough truckstops to power your batteries.
If you don't have fusion, you'd need quite a few nuclear plants to maintain that kind of electrical cost.
Air
Motor and factory fumes are the biggest concerns with air. With fusion, you can greatly reduce that, though some factories might still produce toxic fumes. They'd need to be kept away from the living areas, and maybe you can develop filters to prevent most of that junk going into the air.
Parks are important, for recreation, wellness of mind, and air quality. Of course, if you have many plant factories and vertical farms, air quality should be pretty good.
Shelter
If you want to avoid suburban sprawl, you're probably looking at somewhat minimalist apartments. The most efficient structure is about 3 or 4 stories tall, normally. If you have fusion, that could change things a lot, as it'd cost less to pump the water up several floors, and to run elevators.
But in general figure apartment building complexes that are surrounded by the necessary services, or even have those services built into the complex. After all, if you're going to put elevators in the place, you might as well use them for transport purposes, shifting people around a sort of shopping mall. That said, business areas need to be separated from living ones, by a fair margin, or else constant activity will make it hard for occupants to sleep.
Water
You of course need water treatment plants, and a good water source like a river. You could even use sea water, processing it into drinkable water like Israel is trying, especially if you have fusion.
You can also recycle the sewage of the city, using some of it for fertilizer and either sending the purified water out to sea, or directly pumping it back into the system (that happens).
Of course, since there are genetic issues to worry about, water treatment must be handled carefully. Fluoride, for example, has been condemned by the WHO as dangerous in drinking water since at least 2006, but the US didn't decrease it fluoride until 2015. Even now, their limit is about 4mg/L, which is a lot more than other countries. India's limit is 1.6mg/L, and they have many reverse osmosis plants to try and take the naturally occurring fluoride out of their water.
So, your aliens will have the same concerns, purifying their food and drinking water extensively, since the health of some of them and their children is in question.
I hope this was a useful overview for city design.
