I just don't think there's any way that could possibly work. The Daggerfall endings were mostly not dependent on each other, so it was actually feasible to all have them happen at once. Skyrim civil war is a pretty simple binary choice--either the Empire win, or the Stormcloaks win. (Unless they have it that the "peace" negotiated by the Greybeards in the event you don't resolve the civil war before going after Alduin somehow holds after the point Alduin is defeated, which would almost be more unlikely than a dragon break).