I am convinced that they do not exist!
I will join in with those who've said that Nurse Mates are terrible. I will go out on my own and say that Rockers are worse. I owned one pair of those and only wore them a few times. They were never comfortable, but the last time I wore them, I could not walk by 4 hours into my shift! I had to borrow a co-worker's spare pair that she kept in her locker (as opposed to working in my socks - ICK!)
I feel like I have tried on every style of every brand of shoe that exists and have yet to find a comfortable pair. I owned one pair of New Balance shoes that were comfortable, but they discontinued the style before I could buy another pair.
The "replacement style" was completely different and one of the worst things I have ever put on my feet.
I would LOVE to find comfortable shoes!