I can vouch for Linux Mint / LMDE; their pre-installed software and defaults seem very sensible and I need far less set-up, fixing and fiddling (esp. with NVidea hardware; the open-source driver refused to make anything run on GPU with my Asus ROG Strix GTX 970) then on bare-bones Debian or Ubuntu LTS.
All four mentioned here have very stable and safe release schedules.
Bazzite’s defaults help a lot with gaming (and that stupid NVidea driver) and the initial welcome-screen helps you install the Steam, Lutris, OBS, etc. you want and leave out anything you don’t. It’s actually helpful, really!
I do want to add Bazzite’s team seems to have only one person who can sign releases, and they did misplace a key at least once leading to nobody receiving updates until they replaced the key in their installation.
Their team management does not seem the best; assuming this was a one-off thing Bazzite can still be a great, stable choice.
And that setting up, and updating it, takes much technical knowledge, a lot of time, and the packages and their updates come from whoever on the internet much like the AUR.
For stability, I would not recommend NixOS, at all.