The projects are all but gone, LemonPrism.
There is no place in the US where life is at all comfortable without a well paid job.
North Carolina cities have a lot going for them, especially in the research triangle, as do old resort towns like Asheville in the mountains. Vermont is nice too, but avoid small towns and rural areas. Major cities and their suburbs tend to be much nicer places to live than small rural towns. The addiction crisis has hit rural America very hard.
If you have a decent income you will be able to avoid areas of high crime in big cities (it tends to occur in certain high crime pockets). I live in the Chicago area and honestly I frequently leave my back door unlocked. I am fifteen minutes on foot from the street that divides Chicago proper from my suburb. Life is incredibly different on the other side of that street. The glaring difference is something I appreciate as I am on the 'right ' side, but feel very bad about. Children's life chances on either side of a dividing street shouldn't be so predictable.
I believe Des Moines, Iowa, was recently named one of the best places to live in the US, if you wanted to look at somewhere not exactly high on any expat's list. People I know who live in Nashville love it. It wouldn't be my cup of tea.
Many of the Virginia and Maryland suburbs of DC are nice, as is Charlottesville, VA, about 3 hours from DC. Albemarle County schools are very good. Within DC itself, areas in NW DC are nice, but some areas are incredibly pricey (Georgetown for instance). Any college town hosting a big university or a cluster of universities, especially research universities, might be a good bet. Madison, Wisconsin springs to mind. It's also the state capitol.
If you're planning on a long term move to the US you will need to take third level education costs into account. I would put Texas on my list because of its excellent third level education system and funding. Not just anywhere in Texas though - Austin specifically. Also Pennsylvania and Virginia (both public Ivies), Massachusetts (excellent education system all round), and the Big Ten states, especially Michigan but also Minnesota (Minneapolis-St. Paul), Illinois (Chicago area), and Wisconsin.