Here is what I consider my "Essential", award winning , plugin pack for Paint.NET v4.1 and beyond.
It includes 43 plugins in 33 files, 1 palette file, and 48 shapes. This allows you to pick and choose to install only the effects you want. Then, later you can run the installer and uncheck an item to uninstall it.
When you see in this post, you can click it for more information (including source code in some cases).
To install, download this file to your Desktop, unzi