In the US: Miami,Atlanta, Houston minus #4. Is there a city outside of Northeast that isn't car centric?
"Actually diverse" is a tall order. Maybe a handful of cities fit that globally imo: in addition to the list above, nyc and I don't know, can't think of any but I am sure they exist.
Atlanta is second to maybe only LA in terms of how bad the traffic gets. Neighborhood streets backed up with highway traffic bad.
Definitely not the place to look if cars stress you out like they do for me. On the bright side living there disillusioned me about American cities and now I live happily car free in Tokyo :)
Houston is much easier to navigate with a car, but you can find a few transit-centric areas (mostly downtown and in the areas around Rice). You would be SOL if you wanted to get to a different part of town without a car though.
"Actually diverse" is a tall order. Maybe a handful of cities fit that globally imo: in addition to the list above, nyc and I don't know, can't think of any but I am sure they exist.