“Get rid of the ‘flying cigar tube’ design”
That’s a bit like saying “get rid of the three box design for a sedan”. Some shapes occur for the reason of practicality.
The only viable options aside from the “cigar tube” is the “flat cigar tube” (aka “blended wing”) where the body acts somewhat like a wing and some sort of true flying wing or V wing.
They do exist, e.g., Natilus Horizon actually flies and the TU Delft (a V wing) is being built.
They look really cool!...................