Morgana

Despite what everyone else might think, Ron Weasley never thought himself alike some hero of the old legends, till his mother's beloved „Witchly Week" hit him over the head with it.
If someone would ask, why he read that stupid article anyway, Ron wouldn't be able to give an answer.
Why did he?
It wasn't important, neither his reason, nor the article itself, a piece of trash that compared them all to the heroes of old.
Of course Harry got to be King Arthus, the Savior of Britain (there even was this really crappy comparison between his wand and Excalibur. Honestly!), Ron himself was Lancelot, the great and loyal knight.
(They mentioned Dumbledore too, no question, Merlin it was.)
And Hermione was Queen Guinevere.
The author (and Ron was willing to bet it was some middle aged witch, living alone with her cats) gushed on and on about "star crossed love" and "the fateful triangle" and how "tragically romantic" all that crap was.
For Ron, it hit to close to home.
And from then on, he couldn't help but wonder and doubt and what if…

Over the years it became a habit, comparing everyone to those legends to.
Obviously the DA were the knights of the round table, the order a mixture of that and Merlin's companions and students.
He first thought that Voldemort just had to be Mordred, but later decided that he was more like a Saxon lord, with a whole different view on the world, all the destruction he caused and the conquering of Britain.
This led him to the conclusion that James Potter must have been Uther Pendragon and Lily would be Igraine then, with Snape as Gorlois of Cornwall.
Lucius Malfoy would be Lot of the Orkneys and Narcissa his wife Anna, if that wouldn't make Malfoy (Draco) Gawain, a knight of the round table and loyal to the light and he couldn't for the life of him, decide, if Dumbledore was really Merlin or maybe Ambrosius or someone else entirely, but that was okay, because hey, it was Dumbledore they were speaking of!
That was usually the point where he would shake himself out of the thoughts, because they were all real people, damnit, not some dusty old myths!
It was only the original three – Arthus, Guinevere, Lancelot; Harry, Hermione, Ron – that remained somewhat fixed in the back of his mind.

It would be years, before he finally saw it.
Years and a beautiful wedding and three kids, till he knew, that if Harry was King Arthus, then the positon of Queen Guinevere was comfortably filled by Ginny, madly in love with Harry and only Harry, a Queen Guinevere that Ron loved, of course he did, but as a little sister and never as a woman.
Years and battles and seeing her take on wizards (death eaters!) easily twice her age and more and win, watching her put that brilliant (if a bit scary) brain of hers to use, observing that spark in her eyes and that small, vicious smile that would sometimes ghost over her face, after she crushed another opponent (be it in battle, in court or in a discussion), years of her moving on, moving forward, becoming a lawyer and a researcher and changing the world, years of pinning after her, till he finally saw it.
That Hermione Granger could have never been anyone but Morgana.
And Morgana never fell for Lancelot.