Chicago is well represented here, so I'll do some other cities I'm familiar with.
Boston:
I'll go with Waltham (I don't think Brookline, Cambridge, Somerville or Chelsea count).
https://www.google.com/maps/@42.3688...7i13312!8i6656
Milwaukee:
Slim pickings, but I think I'd go with Wauwatosa.
https://www.google.com/maps/@43.0493...7i13312!8i6656
Bay Area:
Palo Alto has nice aesthetics:
https://www.google.com/maps/@37.4445...7i13312!8i6656
although it's a bit too bougie. At least there are no longer like 20 Persian rug stores on University Ave like there were 10 years ago. I actually liked the California Ave strip more (
https://www.google.com/maps/@37.4263...7i13312!8i6656) when I lived there. Not sure it really counts as a suburb though given all the jobs there.
I also like San Carlos's vibe:
https://www.google.com/maps/@37.5052...7i16384!8i8192
Madison:
Not really a suburb (maybe) but Stoughton has a nice little downtown:
https://www.google.com/maps/@42.9167...7i13312!8i6656
Maybe one day it'll get rail service again:
https://www.google.com/maps/@42.9178...7i13312!8i6656