grsec (rbac) - distributions don't really include it apart from arch, gentoo, and other high-maintenance ones; default targetted configs not included
tomoyo - easy to use for developers, but also often not available in default kernel; for normal users? start by explaining to them what syscalls and ioctls are; default targetted configs not included
akari - you're on your own to compile it in, and the tools, and figure out which version you want, and ... (not simple process); default targetted configs not included
apparmor - the only user-friendly alternative right now
Lesser? grsecurity is actually a far superior alternative to SELinux: https://grsecurity.net/compare.php
It's unfortunate that their stable patches are no longer available publicly: https://grsecurity.net/announce.php