Reddit is Terrible
Black Reddit stylesheet that isn't terrible.
A black theme for Reddit that you can install with the Stylish add-on. Here is a direct link.
Every other dark theme for Reddit is terrible. This one is less terrible. It quells a large amount of custom subreddit styles and doesn't attempt any terrible "enhancements" to the content. The primary objective is to not burn your eyes when clicking links.
Feel free to submit any contributions. I have no strong attachment to this work so I will accept anything.