The founder of Dominos pizza built the city of Ave Maria, FL -- It gets high marks in the child safety/friendly category from the local press but feels suburban to me.
The most famous example is probably Seaside, FL built buy Duany Plater-Zyberk, it was the set of "The Truman Show". The story is interesting they had to fight all these dumb zoning laws (eg. The Fire Department buys the biggest truck they can find and then think that every road in the state must accommodate it) -- DPZ has other stuff worth checking out: https://www.dpz.com/Projects/All
My favorite is in Jakriborg, Sweden https://en.wikipedia.org/wiki/Jakriborg
You learn about this sort of stuff if you are plugged into the urbanist blogs / podcast scene