The Grand Hyatt underwent a major refurbishment in 2018 and still feels brand new. The location is the best in the entire city

Mandarin Oriental has a kitsch faux-European decor with a less desirable location. Started to age only after 9 years of its opening. Not up to the group standard at all

Taiwan has zero 'true' luxury hotels up to the flyertalk standard if that's what you're looking for, but they're good for the price. Check out W and Le Meridien as well