[jtchang]

I like angersock's list since it shows a lot of areas that I would expect a generalist to know. Obviously not exhaustive but it's a pretty good list.

That said you are going about it wrong if you are looking for a linear path to become a generalist. It is more like a giant graph of areas and you start from one you like and branch. The "right" node to start at is what you enjoy the most.