I agree with @xaprb that this question is hard to answer because it’s subjective.
I use my own theme, called Midnight. I do my best to keep it up to date with Hugo’s newest features, though sometimes it takes a while to get the ones that require changing most of the template files.
It’s not in the theme directory yet, since the main repository is on self-hosted Git, which is not allowed. Also, It’s a massive refactoring of my previous theme, and I’m working out some small bugs that didn’t get noticed in the initial process. Once I get those ironed out and I get a new minor release out, I’ll be working on getting it listed from a GitLab/GitHub mirror.
Regarding typography, Midnight comes with its own bundled theme files from Font Squirrel, though the plugin system makes it possible to use whatever fonts you want using custom CSS. There are also plugin types for integrating commenting systems, custom shortcodes, and custom sidebar widgets.
You can also customize the appearance of the site in a number of ways, including a background image and custom color schemes. Certain design choices in the theme are automatically configured based on the colors chosen, like the syntax highlighting theme, Patreon banner image, and Iubenda privacy policy button.
The theme has a lot more features than that, with documentation for all of it - I have to reference it a lot myself, since I can’t remember every option. There is also a setup guide to help make getting started easier.
TL:DR; I’ve put a lot of work to make a theme that I like using and want others to enjoy using too. I also respond to emails asking for support, and all bug reports.