i think Slackware is a fairly simple distro. like sin mentioned you can have a fairly small install with tag files. It also hasn't changed much in 10 years. they just have new packages :)
there are some live distros like slax that are based on slackware :) or corelinux are good. i think the effort for morpheus or sta.li are both necessary since most distros have strayed away from simplicity. --Carlos
