There isn't one single "most powerful" elf, as power varies by era and type (wisdom, might, spirit), but Galadriel is often cited as the most powerful in the Third Age (LOTR era) for her wisdom, foresight, and bearing Nenya, while Fëanor (creator of the Silmarils) had the greatest inherent spirit and potential, and Fingolfin was a mighty warrior who challenged Morgoth. Other contenders for ultimate power include Glorfindel, known for his strength and power over unseen forces, and even Lúthien, though technically half-Maia, displayed god-like power.
In the section "Of the Sun and Moon and the Hiding of Valinor" from The Silmarillion, Tolkien wrote, "Fëanor was made the mightiest in all parts of body and mind, in valor, in endurance, in beauty, in understanding, in skill, in strength and in subtlety alike, of all [Elves and Men], and a bright flame was in him." ...
Lord Elrond is more powerful than King Thranduil in a one-on-one. Elrond has 1/16th god blood. He is a mighty warrior and he possesses wide knowledge of healing arts. Spiritually he'd be more potent than Thranduil.
No. Not even close to Beleg and well down the list of renowned warriors (of any race). Tolkien himself said Legolas accomplished the least if any member of the Nine Walkers. Aragorn, discussing who can follow Frodo to Mordor picks Gimli over Legolas to go.
Galadriel is ancient, the Leader of the Northern Armies and particularly obsessed with combat. Legolas is no slouch, but Galadriel is just next level when it comes to melee.
We know that Elrond, Elendil, Gil-Galad, Cìrdan, and Isildur were enough to beat Sauron (although he had been weakened by the fall of Nùmenor). So we can replace Gil-Galad with Galadriel (the greatest elf to ever live, along with Feanor), and Cirdan with Glorfindel's near Maia-level powers.
He can't simply leave Galadriel to her fate, though. So, we must intuit that Elrond kissed Galadriel in order to distract Adar and the Uruk (who were so shocked that two characters who have no business kissing were kissing they forgot to pay attention) from the rest of what he was doing.
Celeborn was the Lord of Lothlórien and husband of Galadriel, Lady of the Golden Wood. He was said to be one of the wisest Elves in Middle-earth at the end of the Third Age.
Late in The Fellowship of the Ring, the companions encounter a mysterious being that we only later discover to be a Winged Nazgûl. Though they aren't able to identify it, Legolas succeeds in shooting down its flying steed.
Therefore it is feasible that he would have never actually had a wound before, especially as it took all that from Bolg to get the smallest nosebleed. Therefore seeing his own blood came as quite a shock. And demonstrated the violent nature of his foe to both Legolas and the audience.
Why was Sauron afraid of Aragorn potentially possessing the Ring? Gandalf explains it in the Return of the King (during the council after the battle of the Pelennor fields) that Sauron would never think somebody would want to destroy the One Ring.
The movie the Battle of Five Armies expanded on Tolkien's canon by saying that the white gems Thranduil wanted back from the dwarves were originally intended for her, but that she was captured and taken and tortured to death by Gundabad orcs before the order was completed.
Just like it had happened with their parents (also Half- Elves), they were given a choice to choose the life of an Elf or the life of a Human. Elrond chose the immortality of Elves, and his brother chose the Humans, the first one to do so. He lived 500 years, which is not too shabby.
Her name "Ar-wen" means 'noble maiden' in Sindarin. She was given the name "Evenstar" as the most beautiful of the last generation of High Elves in Middle-earth. Arwen said: "Dark is the Shadow, and yet my heart rejoices; for you, Estel, shall be among the great whose valour will destroy it."
He is a Sindar Elf of the Woodland Realm and son of its king, Thranduil, becoming one of the nine members of the Fellowship who set out to destroy the One Ring. Though Dwarves and Elves are traditionally rivals, he and the Dwarf Gimli form a close friendship during their travels together.
It's possible that Gollum's prolonged search for the ring allowed it to maintain a significant power over him, suspending his aging process. In contrast, Bilbo's exposure to the ring's influence waned after he willingly (mostly) relinquished it, allowing his aging to resume more noticeably.
Tolkien's description of Gollum conforms to a Catholic – and Thomistic – account of envy, which is a “sadness of the soul”; and it is Gollum's unbearable sadness and his unquenchable desire for the one Ring that marks his character.
Tolkien's Legolas is extremely introverted. He just doesn't have much to say directly to anyone, perhaps because he's thousands of years old. His odd relationship with Gimli draws him out in a way the hobbits never do, and that's mostly after Frodo and Sam leave the Fellowship.
Arwen Undómiel, often called Arwen Evenstar, was one of the half-elven, married to Aragorn II. She was the daughter of Elrond and Celebrían. She was considered to be the fairest of the Children of Ilúvatar in the Third Age, resembling Lúthien of the First Age who would never again appear in Ëa.
When Tolkien wrote comments about some art that Allen & Unwin had commissioned, he described Gandalf as “shorter than the average of men and now stooped with age.” Thats not even right. Elwe Thingol is the tallest elf to ever live at 8' 11". Beorn is 7' tall.
The Ent who figures most prominently in the book is Treebeard, who is called the oldest creature in Middle-earth.
By lingering behind, she chose mortality so she could rejoin him. She died a year after him of heartbreak if I recall correctly. She chose a mortal life to be with Aragorn, as such she could no longer travel to or set foot upon Valinor. Gimli, Bilbo, Frodo, and Sam were the only mortals ever granted passage to Valinor.
Though its people were diminished, Rivendell was maintained, for a while, by Elladan and Elrohir. They were later joined by Celeborn, who left East Lórien within a few years of Galadriel's departure with Elrond's party. It is not known when Rivendell was finally abandoned, but shortly before he died in F.A.