Sword of Spirit
Legend
If you really want to get confusing, the 5e MM also mentions fey gods (in the unicorn entry).
The description makes it sound like Lurue might be comparable to how Auril appears in Rime of the Frostmaiden.Lesser deities are embodied somewhere in the planes. Some lesser deities live in the Material Plane, as does the unicorn-goddess Lurue of the Forgotten Realms and the titanic shark-god Sekolah revered by the sahuagin. Others live on the Outer Planes, as Lolth does in the Abyss. Such deities can be encountered by mortals.
There are write-ups of several of these in Cawood Publishing's Monsters of Feyland, for those who want stats. It's a solid book for the Feywild or any fey-inflected woodland.PHB gives the names: Prince of Frost, Queen of Air and Darkness, Titania, Oberon and Hyrsam as examples. Prince of Frost I think was first mentioned in 4e, while Queen of Air and Darkness, Titania and Oberon were at least since in 2e's Monster Mythology, and Titania and Oberon are best as known coming from William Shakespeare's A Midsummer Night's Dream.
My guess is that archfey aren't trapped in their domains, so much as they create demiplanes that reflect their interests and passions. Powerful mages in Mage: The Ascension did something similar. I don't think WotC wants to have two planes full of prisons and making Domains of Delight something else would be the easiest way to differentiate them, since some of the Feywild will certainly be almost as dark as some parts of Ravenloft.It's been suggested that the Beast Lords (despite originally being placed in the Beastlands) are also Archfey. Powerful Hags including Baba Yaga from Slavonic Mythology might qualify as Archfey.
All things considered, I doubt any of these names are the type of Archfey to be confined to a Domain of Delight, though it might be such domains are less a prison, or there's effectively two different tiers of Archfey, and those big names are like the Dark Powers of Feywild.
There's a dial you can turn with them. While Midsummer Night's Dream is certainly whimsical, I'd say Macbeth is also a template for fey adventures, which isn't whimsical at all.I've never found fae particularly compelling - their sense of whimsy and mystery is difficult to portray well in a game I have found, so I've avoided it...
Those are likely the Seldarine? I was really fond of the idea of elves presented as fey back in 4e.If you really want to get confusing, the 5e MM also mentions fey gods (in the unicorn entry).