FWIW: I use the Riv chart, but downsize 2" or even a tad more from their recommended size. I don't care for larger frames for touring though and prefer my touring bike fit and cockpit setup to be the same as or at least similar to what I would race with.

I once bought a bike that was exactly my size according to the Rivendell chart and wound up selling it to a taller friend who loves it.