Pinning Down the Middle

If Weird West anchors the "Simple" side of the list and one of the Hackmasters anchor the "Complex" side of the list, I need to pin something for the "Average" middle of the list.

I'm thinking Swords & Wizardry Core to mark the middle, although there is a lot of subjectivity to it all, it seems to fit there fairly well. S&W Whitebox would then sit at "Fairly Simple" and S&W Complete would sit at "Fairly Complex".