What are we counting as a 'city'? Obviously Tokyo, Bangkok etc but is Florence (300,000 population) a city? If so, then Chiang Mai (130,000 population) in which case 137 Pillars House and Anantara Chiang Mai (and Four Seasons on the outskirts)? Also potentially opens up a huge amount of Chinese cities but prominently certainly something like Amanfayun in Hangzhou.
Also, Lodhi New Delhi would be another one for consideration.
Banyan Tree Seoul - anyone been? Loose consideration for this one and Banyan Tree Shanghai (didn't get a chance to check this out) and Banyan Tree Macau if Aman Tokyo (city tower block) could be considered.