I grew up in Oak Park, so I couldn’t help but respond. Great town, but doesn’t meet your specifications, as you said.
I haven’t lived in the area for several years, but from growing up there, I can point you north and west of Chicago. That seems to be where the major planning and development is, especially west. Maybe Naperville or Aurora. Does it matter to you how far away from the city you’d be?
This Wikipedia article on Chicagoland gives some solid demographic data. And this forum discussion I found for you discusses crime and desirability amongst suburbs for a person moving from southern California.