Depends on what you want housingwise but it sounds like Allentown's West End from just west of Union Terrace to Cedar Beach Park around the Rose Garden and then north to Muhlenberg College and beyond and then on our into South Whitehall Township's older established suburban areas like Centronia might work for you. A number of parks, very walkable, near shopping, hospitals, and easy access to major highways.

Nice mix of single-family houses, twins, a few rowhome blocks.

One note: South Whitehall in Parkland School District will typically have lower real estate taxes than the West End itself in Allentown City School District but the charm of the West End might make that worthwhile.

I've lived in the general area for over 50 years and the area I described has become much more diverse and liberal than it used to be back in the 1970s and 1980s.