Secret history is up there -- the last one I mentioned.

Alternate history and technothriller (which I called SF thriller) I mentioned last week with science fiction. (And alternate history with magic I classified as historical fantasy.)

You're right that I left out utopian fiction. I don't believe I've ever read any. I have seen the argument that utopias are merely disguised dystopias, but I don't know whether it's true.

I ignored dystopias, too -- mostly because I don't like reading them. :)