As weird as this sounds shape ups are what i loved the first pregnancy and i was on my feet 8 hours of the day. The rocking motion helps not to create pressure points so my feet were swollen but not really sore.
Hush puppies. Not sure if they're available everywhere but they are padded and really comfy.
Shoes with lots of padding in the bottom. They feel like your walking on air I get mine from clarks and although theyre not good on the eye they're so comfy haha
Flats. They can be dressy or casual depending on your workplace. Buy them bigger than normal; your feet will swell.