Chinese people I've heard from generally say 昆明 (kunming) is the best place to live, at least from a natural scenery and weather perspective. Here's a map, where 昆明 is outlined in the 四季如春 (four seasons as spring) area, meaning the weather year-round is like spring. Beyond the climate, 云南 (yunnan), where 昆明 is located, is a mountainous province that is also a biodiversity hotspot. There's bountiful microclimates and many local cultures as well. Definitely not a "Max GDP" sort of place, but the other factors are incredibly good.

I've only been to Chengdu, which I thought was fantastic. Weather seemed decent, has excellent food, beautiful natural scenery nearby, amazing museums/history, pandas, Sichuan opera, extremely friendly people, and it also has a reputation for being the gayest city in China:

A healthy work/life balance is a signature of the Chengdunese; and that laid-back approach is present in every aspect of life there—including social mores. It confers on the locals a reputation for tolerance that has helped its LGBTQ+ population feel more comfortable being open and out. “It’s the lifestyle here—people don’t work so hard, they’re outdoors all the time,” says Kurt Macher, the openly gay general manager of the Temple House. “People look at you here, they smile and they don’t care. I see many gay Chinese couples walking down by the river, hand in hand, and I’ve never seen that in Beijing, Shanghai, or even in Hong Kong.”

Also, while I think it is a tourist hub for people in China (especially the panda research center), I saw no other westerners the whole time I was there, so you're unlikely to see anything specifically catering to expats like you described.

There's a saying in Chinese 上有天堂，下有苏杭 which means 'Heaven is above, on Earth there is Suzhou amd Hangzhou'.

I loved Suzhou. Suzhou is a large city about an hour west of Shanghai (half hour by HSR) in the wealthy province of Jiangsu (think Newcastle relative to Sydney, Geelong to Melbourne). It's an old city full of canals (I mean... all the cities are old) built close to the Great Canal. It's reputed for its old silk culture and style of opera (not as famous as jingju but quite nice). Hangzhou in nearby Zhejiang province is probably a bit too tech-y, influencer-y (it's the headquarters of Alibaba) but is considered one of the most aesthetically pleasing cities in the country alongside Suzhou because of the West Lake and its rolling tea fields. Nanjing (the capital of the Jiangsu province) is very nice too and probably overlooked.

Other cities tend to be those that are within commuting distance from major cities like Zhuhai (close to Shenzhen) for employment but not over urbanised yet.

Wazzup Beijing

Wulingyuan and the best food are both in Hunan Province.

All the cities seem great to me. Guizhou, Chongqing and Kunming stand out, but I've got lots more to see.

If I had to pick now I'd probably choose Chongqing just because it's bloody massive and has everything

Taiwan

Proud Cantonese here. Come to Guangzhou! We welcome everyone and it’s always hospitable all year round, not to mention we are pretty close to Hong Kong. Guangzhou is a chill city with pretty laid back people, with a unique Yum cha culture (lit. “drink tea”). Unlike Shenzhen, which is modern but soulless because it feels like a big company conglomerate - everybody goes to there for work (including me).

Other nice cities to live in including Lijiang: stunning scenery, good & unique food, etc., Suzhou: a laid back city with a rich culture and very comfortable weather, and Chengdu: another welcoming city with an open (compared to the rest of the China) culture.

Shenzhen, modern city. Busy city, good job opportunities should be a thing if you know Chinese sufficiently. Amazing metro, and if you want more capitalism, visiting Xianggang(Hong Kong) is a breeze. I enjoyed my (quite long) time there

Idk, but I love watching a YouTube channel called Little Chinese Everywhere. By a Chinese woman who is on her way to making videos of every single province in China. She goes into homes of locals like every episode. Asks them about life there. Sometimes multiple homes. Crazy levels of hospitality in many total strangers. I'm American and it made my bf cry because we deeply feel like these are our people. Maybe her channel will inspire your choice making. It certainly makes me want to move to China.