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I came in here to mention myNoise too. I use it all the time for noise masking. The office noise generator isn't my thing, but there are numerous other sounds to choose from--white/brown/grey noise, rain, ocean waves, a purring cat, space(ship) sounds, and all kinds of other stuff.

https://mynoise.net/

I don't know, the one you just posted is more "beautiful" to me. It's easy to control, the UI is intuitive (it took me a bit to understand the OP), and the sounds are both higher fidelity and more accurate. None of the noises in OP were ones that are regularly in my large (20-30 people) open office, while this link you've shared is significantly closer.

Upvote for mynoise.net. This is a more accurate representation, in my opinion. They have a lot of high quality sounds, and we play the baby shush sounds for our infant almost everyday.