Chernivtsi was ranked the safest city
It looks like Chernivtsi is very safe are there enough people in that city?
Otherwise it will be a boring place if there are no many people,
Good city, population is 200 or 250 000, is it enough? ))
Good architecture in center, also Carpathian mountains are not far away (1 hour drive by car, or a bit more by train)
If you need many people - Kyiv would be best option. Outdated statistics says 3 million inhabitants, but I think it's around 5 million, and Kyiv is growing more and more