But something like Springdale, given resources, might be able to provide. They're still tracking RHEL 7, though.
Debian and Ubuntu, which offer five years of Long Term Support are the next best thing available, and that's already kind of tight for long-term deployments of self-hosted, old-fashioned business software.
Debian is particularly impressive, since they, on paper, aim to support all packages with security fixes, whereas Ubuntu's main repo is a lot more limited.
OpenSUSE Leap versions seem to get three years, which really isn't enough software that needs to just work for a long while.