Stable? I never had instability of any kind with gentoo like... Ever... Except for faulty hardware (dead USB Ethernet card, bad memory stick...).
Gentoo let's you build the most skinny and bloatless server you can, just what you need how you want it. No bullshit, no choices made by others (Ubuntu I look at you). And optimized for your hardware too.
Today's compile time is ridiculously small, so that's not a down point for Gentoo.
Also, its so damn adherent to the true Linux philosophy that its surprisingly logical and coherent in it's internal organization that doesn't get in your way.
Ah, and docker and podman support is piece of cake if you like that stuff.
Its even less bloated than a plain text-only fresh Debian install.
You don't even have a logger or a cron daemon by default unless YOU install it.
And there is so much great quality documentation that even navigated Linux people will learn new tricks installing Gentoo.
Check out the Gentoo Handbook online.
And I have more than once installed gentoo on another running Linux, then rebooted remotely to a fresh Gentoo. Do it with any other distro, I dare you!