Totally agree with Mike above, but if you need to stay in Geneva, then I'd say FS, La Reserve, or the Woodward. Also, while I've personally never stayed at Beau Rivage or the Mandarin, I've had clients who stayed at both recently and had great experiences.

Based on your trip goals, adding these for you to look at as well; the new Six Senses in Crans-Montana (think it's open?), and Grand Resort Bad Ragaz. We did a fun day trip to Liechtenstein from Bad Ragaz a few years ago and there is some incredible hiking, meanwhile the country itself is a fun experience.