Sauron's deepest fear was that Aragorn would use the Ring against him. With its powers of domination, Aragorn could comfortably take over the entirety of Sauron's dark army. Though this would eventually corrupt Aragorn, it would allow him to destroy Sauron and take his place.
In the Third Age, he probably considered Saruman as his worst enemy, until he became corrupted. And he remained a threat, seeking the One Ring for himself. But he'd then have seen Gandalf as the chief problem. Someone who constantly caused his plans to fail.
In his notes, Tolkien remarks that Sauron saw Galadriel as his equal. Add that to the fact that she's untrusting of Sauron (yes, even when he's in his Annatar guise) and an unwavering, single-minded force, and it's more likely than not that Sauron feared Galadriel — or the potential she held to upend his plans.
Morgoth, the first to reign terror upon Middle-earth, was more powerful than Sauron and commanded an army of dragons and Balrogs. While both Morgoth and Sauron were cunning, Morgoth's rule and terror lasted longer and his corruption spread further, making him more formidable in the Lord of the Rings universe.
Meanwhile, a few faithful Númenóreans, led by Elendil, were saved from the flood, and they founded Gondor and Arnor in Middle-earth. Sauron still considered them his hated enemies and he launched a pre-emptive attack on Gondor in S.A. 3429.
Whom Did SAURON Fear The Most?? | Gandalf or Aragorn? | Middle-Earth Lore
Who is Sauron most afraid of?
Sauron's deepest fear was that Aragorn would use the Ring against him. With its powers of domination, Aragorn could comfortably take over the entirety of Sauron's dark army. Though this would eventually corrupt Aragorn, it would allow him to destroy Sauron and take his place.
Sauron seemed to genuinely feel a connection to her, and part of that came from sensing the darkness inside of Galadriel. In that regard, his offer was really a seduction to the dark side.
Take note, then, that at the root of Gandalf's quest is fear -fear of Sauron in particular. We are not told exactly why -but Sauron is a fellow Maiar, an angelic being who chose to follow Morgoth at the beginning.
Despite feeling some possible temptation from Sauron's offer to become his Dark Queen, Galadriel's denial of the Dark Lord shows she can't be so easily swayed. However, that doesn't mean Sauron still won't try to trick her into helping him gain the power he's destined to obtain in Middle-earth's Second Age.
Though wizards are technically Maiar, they do not possess all the same abilities in their wizard forms. This is why, despite Balrogs and Sauron also being Maiar, Gandalf wasn't evenly matched in his wizarding form—especially as Gandalf the Grey.
In general Sauron did not seem to be afraid of the Balrog during the Third Age. The behavior of Durin's Bane indicated that he would not leave Moria and its tunnels : he was not a rival for the control of Middle-earth and the Balrog did not share Sauron's abilities as a potential Dark lord.
Because Sauron lost his Ring, his power severely diminished, and it took him thousands of years to rebuild his power. Even after Sauron declared himself again, his sole focus was on finding the Ring, not on solidifying his dominion.
He will fight in the Last Battle against the Valar and their allies, but will ultimately be slain by Túrin Turambar, the Man he cursed. By finally defeating Morgoth, Túrin will avenge not only himself, but all members of the race of Men.
Finally Sauron came out to fight Elendil and Gil-galad face to face. When Elendil fell, his sword Narsil broke beneath him. Isildur took up the hilt-shard of Narsil and cut the One Ring from Sauron's hand, vanquishing Sauron.
The answer is, by far, Melkor. Melkor, or Morgoth, wanted to currupt and destroy everything good created by the other Valar. Sauron on the other hand only wanted to control and rule Middle Earth.
Sauron was originally a shape-shifting fallen angel and could take on various forms, including a vampire and a werewolf. Sauron's final form was terrifying and demonic, reflecting his own hate and evil, and he did not wear armor in the books.
Sauron, in origin a Maia of Aulë like Saruman, awed and frightened him. During the height of his arrogance, Saruman thought he could contend with Sauron, but in the end he found himself meddling with a spirit of far greater power and knowledge than himself.
Sauron was severely weakened at that point in time, and they still barely defeated him. So, a fully-powered Sauron with the One Ring to boot would likely have been too much for them.
Additionally, while he was in his weakened state, Galadriel could hold him off through the power of will alone. However, if Sauron had his One Ring and faced off in a battle against Galadriel, it's unlikely that there would be much she could do.
Saving Galadriel at sea was likely a method of gaining her trust, since Sauron would need an Elf's friendship to enter their realm. Whether he targeted Galadriel specifically because he could exploit her bloody-minded rage and broken heart is unclear.
The finale shows how it is possible for an elf to fall, in a disturbing scene in which Sauron tempts Galadriel by attempting to twist her better nature. He offers Galadriel an alliance, insisting that together they can bring about the restoration of Middle-earth.
In their prime, there can be no comparison. Morgoth is the more powerful of the two. Morgoth was the mightiest of the Valar, a group whose weakest member would outpace Sauron. However, there are some circumstances and eras in which Sauron would win the day.
Rather than cast magic at Sauron, Galadriel opts to challenge him on the spiritual plane; she resorts to her Wrath form to penetrate Sauron's mind and break his will. She obviously succeeds, as Sauron audibly cries aloud as he flees.
They served Sauron out of fear, but they also savored the chance to kill and feast on the other beings in Middle-earth. Orcs were vicious fighters, but they had one noticeable flaw. They absolutely despised sunlight. As servants of evil, that makes sense, but there's actually a much more lore-centric reason.
