Here are some airship hulls,with position of maximum cross-section aligned,and normalized to a constant cross-section with the lower table,noses aligned with the first.They're all streamline bodies of revolution.None of them 'cheat'.They maintain the classic streamline form.
The bottom airship of the lower table would have the lowest drag of all the ships.It would not necessarily be the 'best',as it would be prone to giving the crew airsickness.Longer ships are preferred as a camera,electronics, or weapons platform.