As others are saying, Debian is nice and stable. Its also pretty barebones, which gives you a lot of control. However, it uses older packages, meaning you’ll need to rely on flatpaks to get new features.
If you’re willing to lose a bit of stability in exchange for newer features and more control, you may also want to look into arch or endeavorOS. Arch uses a command-line installation whereas endeavor uses a graphical installer, but otherwise they’re pretty similar.