More details (and youtube links for the less known movies) under cut. Some of these I love, some are so bad so good, some are beautifully epic, some are just funny.
Knights of the Round Table (1953): Visually beautiful, epic-like, interesting Morgana and Mordred. Lovely Guinevere. Focused mainly on Lancelot.
The Sword in the Stone (1963): Classic Disney movie, heart warming, still funny moments nowadays.
Sword of Lancelot (1963) (youtube): Visually beautiful romance story between Guinevere and Lancelot, one of my favorite Mordred ever too.
Camelot (1967): Musical movie version of the Broadway musical. Beautiful visually, heart-breaking story, great acting, one of my favorite arthurian movies. Focused on Guinevere, Lancelot and Arthur and the tragedy of it.
Monty Python and the Holy Grail (1975): The best arthurian movie ever created. Parody of the quest for the Holy Grail.
Excalibur (1981): A classic epic arthurian movie. Focuses on Arthur and then moves its focus on Merlin and Morgana. Beautiful fighting scenes and Camlann scenes.
Camelot (1982) (youtube): Camelot musical but this time filmed from the stage, so it has some extra scenes.
Morte d'Arthur (1984) (youtube): Lesser known Jeremy Brett movie focusing on Arthur's last years, on Guinevere's escape and return and on Mordred's betrayal. Narrated like a play, with narration over filmed scenes instead of dialogue.
Merlin and the Sword (1985) (youtube): So bad so good, accidentally hilarious. It focuses on Morgana vs Arthur, Guinevere's love, Merlin and it also has the only movie representation of Gawain and Ragnelle.
Thomas Malory, who arguably wrote the book on knightly chivalry in English, was... one of the most dastardly knaves in all history. He was sitting in prison after changing sides in the Wars of the Roses for the tenth time and robbing and pillaging a caravan, and he was like “Hey! I think now would be a good time to synthesize this massive French romance about King Arthur into a smaller more coherent volume!” Dude spent his whole life as sellsword, sleeping with lord’s wives, murdering people, stealing stuff and causing general chaos, and he ended up immortalizing the tradition of chivalry in literature once and for all.
Medium: Watercolour, bodycolour and gum arabic on paper
Collection: Birmingham Museums Trust, England, United Kingdom
King Mark and La Belle Iseult
The story depicted is from Malory's Morte d'Arthur. In love with Sir Tristram but promised in marriage to King Mark, Iseult tries to kill herself but is prevented from doing so by King Mark, who grips her arm and forces her to drop the sword.