It's hard to rank because I really love some songs or eras, but may also skip a track on an album in which they appear.
My three favorite albums from start to finish remain Dig Your Own Hole, Exit Planet Dust, and Surrender. I am also very fond of Further: it's hands down my favorite of the "modern era". I enjoy No Geography very much and might rank that next, although Come With Us could just as easily take that spot depending on my mood.
I don't think there is a bad album in the bunch, but the others are less cohesive for my ear and often end up being dissected into playlists.