Posted to a NASA Flickr page is this illustration of a 1984 space station concept:
This would probably be a very heavy station for the volume and usable surface area provided. However, once that truss structure is in place, it seems like it would be possible to keep adding on to it without overly stressing the structure, with the possible result of a very capable station. It should also be possible to keep tacking on new truss elements.
The design would necessarily keep most of the station elements shadowed by the solar arrays.