U forgot a very decent chain imo, but very Asia (read China) centric: Shangri-la.
so far they have been the most consistent in quality in my opinion. The Grand hyatt in Taipei is quite dated, really needs a renovation, but with the Park Hyatt opening soon next door, I can see it being retired.
it is quite a mixed bag in my experience. Generally speaking they have very good dining options though (sheraton Grand has a very good pizza place here in TPE, the bar at the W is not bad) but rooms and facilities generally less curated and on point than hyatt (at any brand level)
the good options here are consistently very expensive, try to get at any intercontinental in JP and you are broke, the indigos here in TW completely bonkers prices (especially the one in Alishan), I can’t recall any holiday inn I liked (considering the price)
they are consistent and reliable option, never the fanciest, but solid offering. the doubletree brand is very clever, and the ease to get gold status giving you complimentary breakfast out of the US make it a compelling option always.
Maybe you forgot as not yet present in TW, but soon opening: Four Seasons. What to say about them? It’s a dream, they are just good, but dear. Looking forward to seeing the dining options at the FS in Xinyi.
Also Mandarin Oriental, which is always present in programmes like Amex Fine Hotels and Resorts. They are classy, refined. Dining in the Taipei one is very good (especially now at bencotto with the new Italian chef). They are dear as FS, but quality and reliability are paramount. Their loyalty programme is however very weird, fans of MO, they don’t really have tiers or points, but they just give you random perks at different properties. The more you stay, the more they give you, but all a surprise. Bizarre.