What's the best typeface manager for Mac OS?

I would say that RightFont 3 is probably the best paid Font Manager for the Mac. Looks great, has all the features one needs these days and is made for modern Macs. The old faves Suitcase Fusion and FontExplorer X Pro are pricey with a dated UI.

Rightfont is very easy to use with fluid UX 👌🏽. I especially like the Preview feature.

FontBase 2.0 is a decent free Font Manager if you want a reasonably good looking app with some extra Coming soon™ functionality on its way, but I would say that Apple's own Font Book is way better. It's more functional than FontBase, but hasn't got the flashy modern looks that the other apps have.

Font Base is a good free font manager with a lot of potential, and might be worth revisiting in the future when more features are added.

I've been using Suitcase Fusion for years. It's adapted well to the changes in font use, and I've had no need to switch to another tool.

really like the design and light-weight of this product + it has a night mode

Apple's Font Book is my favorite one. It's simple, powerful and comes with MacOS for free.