@Vortigern , I really enjoyed your post. Some little details I want to mention though.
Famine can't be Gawain. Although the spear is not in Famine's hand, he has Lancelot's hairstyle and there is a scar on the right side of his forehead. So pretty sure he is Lancelot.
War has a spear like Lancelot, but because of Famine's forehead, I think War is the one who has an unknown identity for now.
@Samael Morningstar has a good idea about the similarity between War and possessed Zeldoris. Zelda's kid? Gawain? GiantFairy?
DK reincarnation? I go with this one lol.
Life vs Death. I love your idea.
Couldn't agree more.
Arthur as the king of Chaos may age differently compared to Arthur as a simple human being. It'd be more surprising if he'd gotten older imo.