Few know, but Islamabad is also began its existence as a 100% planned city. Pakistan invited C. A. Doxiadis to do the planning https://en.wikipedia.org/wiki/Constantinos_Apostolou_Doxiadi... . He was considered to be of Corbusier's calibre if not more, at the time.
Faisalabad was planned back in British time. And the now infamous Model Town, as the name suggests, too.
Dhaka, and Karachi were also supposed to get plans at around late sixties, but we all know how it went...
Diodiaxis left Karachi plan half finished when 1971 happened, and Dhaka had an initial burst of orderly development for a few years, but it was cut short after Mujib was murdered, and 20 years of instability followed.
Karachi, and Dhaka now are prime examples of "urban hells" in the world.