The legend of King Arthur could be considered as a 'knight never ending story'. His knights of the Round Table were constantly on quests, facing magical creatures, and upholding justice. Even today, their stories are still retold and adapted in various forms of media.
The tales of the paladins in medieval French literature can also be seen as a 'knight never ending story'. These knights were known for their holy quests and battles against the forces of darkness. Their stories have been passed down through the ages and have influenced many other works of literature and art. There are always new aspects to explore in their stories, whether it's their relationships, their battles, or their spiritual growth, which makes it seem like their story never truly ends.