1. Jaehaerys I the Old King.
Undoubtedly, the most dangerous man in Westeros at this point is the man who holds this title canonically and that is none other than Daemon Targaryen. Daemon is the brother of King Viserys Targaryen. At the beginning of the series, Daemon intended to be King, however, he was eventually cast aside for Rhaenyra.
1 Daemon Targaryen Is The Most Dangerous Man In Westeros
He's the only royal with genuine combat experience, having been instrumental to the Crabfeeder's defeat. Daemon best shows his lethality against the Triarchy forces. He cuts through many men after he feigns surrender and then defeats the Crabfeeder in a duel.
Aegon the Unworthy. Aegon IV was the son of King Viserys II, and is considered one of the worst kings to ever sit the Iron Throne, earning him the nickname “the Unworthy.” I see many similarities between Aegon IV and Baron Harkonnen from Dune.
Vhagar (Aemond Targaryen)
Vhagar is the largest and arguably most powerful dragon alive. The sister of Balerion the Black Dread, Vhagar is also the only living dragon to have flown to Westeros with Aegon the Conquerer.
It was said that Vhagar's breath was so hot that it could melt a knight's armor and cook the man inside, that Meraxes swallowed horses whole, and Balerion ... his fire was as black as his scales, his wings so vast that whole towns were swallowed up in their shadow when he passed overhead.
The weakest King would've been Aegon the unworthy. He was unworthy of the throne and caused the Targaryens to go to war AGAIN by legitimising his bastards causing complete chaos with the Blackfyres fighting the Targaryens.
At the age of thirteen, Helaena was plumper than most Targaryens, and less striking as well.
Daemon Blackfyre
He was tall, strong, and exceedingly handsome, and was Targaryen in all but name. His skill in combat was so great that Blackfyre was given to him when he was 12, as a mere squire. On the battlefield, he was an avatar of the Warrior himself.
The giant she-dragon, Meleys is ridden first by Princess Alyssa Targaryen and later by Princess Rhaenys Targaryen. She's nicknamed as the Red Queen because of the scarlet scales and pink membranes on her wings. She is known to be the fastest dragon in the skies, outpacing bigger beasts such as Caraxes and Vhagar.
aemon proved the greatest jouster and swordsman of his age—a knight worthy to bear dark sister. he became known as the dragonknight for the three-headed dragon crest wrought in white gold upon his helm.
Grey Worm, of course. He was raised an Unsullied, servitude and loyalty is his life. When Daenerys freed him and his people, she became a near deity to him. Grey Worm would give his life in a heartbeat for her without having to think twice.
Daenerys survived the flames when her dragons were born thanks to a mysterious, magical mix of Mirri Maz Duur, sacrifice, and dragon eggs. Yet while Thrones decided to make Daenerys completely immune to fire to explain this experience, it's more of a onetime thing in the books.
Aemond Targaryen Greatest Fear Is That He Won't Live Up To The Family Name. Aemond is Alicent and Viserys' third and youngest son, who spends most of his time yearning for a dragon that befits the Targaryen name.
According to the Balaerys' themselves, their family was one of the founding families of Valyria and they often boast of the claim that the first ever dragon rider was from their house. They were among the strongest houses in the Valyrian Freehold and possibly even the strongest.
Throughout Game of Thrones, the ultimate way in which Daenerys Targaryen is shown to be a “true dragon” is by her resistance to fire. Dany is initially depicted as slightly resistant to heat, including warm baths and other fires.
Young Princess Rhaenyra Targaryen : Everyone says Targaryens are closer to gods than to men but they say that because of our dragons. Without them, we're just like everyone else.
Sunfyre devoured Rhaenyra in six bites, leaving only her left leg below the shin. Prince Aegon the Younger was forced to watch his mother die, and Elinda Massey allegedly gouged out her eyes in horror.
For most of Game of Thrones the series has been labouring under one salient truth: Daenerys is the last Targaryen left standing. At first, it was her and her brother Viserys, the two living children of the mad King Aerys II, a dynasty whose reign spanning some three centuries ended during Robert Baratheon's rebellion.
Balerion - Ridden by Aegon the Conqueror
Balerion or "the Black Dread" was a dragon of House Targaryen ridden by King Aegon I during the Conquest.
Balerion, known as the Black Dread, was the dragon ridden by Aegon the Conqueror during the War of Conquest. He was so large, it was said his shadow could swallow an entire town when he took flight.
Balerion died of old age in 94 AC, at the age of at least 208 years, meaning that by 129 AC the Cannibal would need to be at least 35 years older than that.
Then, in season 2, Arya talked to Tywin about her admiration for Visenya and Rhaenys Targaryen, the dragonriders who took over Westeros with their brother Aegon 300 years ago: “Visenya Tagaryen was a great warrior,” Arya says.