Ken Marschall's painting by a long way. While it may not be as accurate as present day evidence shows, IMO it is pretty close. With so many different types of structures on the deck and inside the bowels of the great liner, a break up is bound to have lots of debris, as depicted in the painting.
The one above, showing the port side of the ship, is the same one as appears in Don Lynch's book Titanic: An Illustrated History, illustrated by Marschall. But in Marschall's own cutaway book Inside The Titanic, the breakup painting shows the starboard side and a closer view of the break itself. With the submerged bow also partly seen, that painting IMO has even greater impact.