Whilst the Jedi Order were guardians of peace throughout the galaxy for thousands of years, the Sith were quietly plotting against them.
Giving us some of the most iconic characters in the entire Skywalker Saga, the Dark Side spawned truly fearsome opponents for our beloved heroes to battle against.
Typically wielding blood-red lightsabers and showcasing some devastatingly awesome Force abilities, the enemies throughout the Star Wars universe proved themselves as strong as the Light Side users, and sometimes even stronger.
Though the Jedi vowed never to use their powers for personal gain, and were taught to be unattached (as fear of loss leads to the Dark Side), the Sith were trained that through chaos they would gain control.
From creating an Empire, to hunting down Jedi, to hurling lightsabers and unleashing bursts of electricity, the Dark Side users have demonstrated their power for years. But it's not only the Sith who can use the Dark Side of the Force.
Whilst there have been many powerful dark-siders throughout the Skywalker Saga, The Clone Wars, and Rebels, only a handful are the absolute most powerful.
10. Savage Opress
The brother of the Dathomirian Sith Assassin, Darth Maul, Savage Opress proved himself to be an aggressive warrior - key in Maul's plans to seek revenge on Obi-Wan Kenobi, and later Palpatine.
Opress was shown to be a vicious opponent, even murdering his own brother in order to gain the trust of Asajj Ventress. Though initially not affiliated with the Sith, Opress was an invaluable acolyte, serving Ventress, Dooku, and eventually Maul. He was led by Mother Talzin to restore his brother, Maul, to strength, and was crucial in returning Maul to his former glory.
A powerful Dark-Side user in his own right, Opress challenged Maul in a duel to become the Master in their duo; although Maul bested him, Opress was still powerful enough to defeat and kill Jedi Master Adi Gallia.
Opress eventually met his demise at the hands of Darth Sidious, with Opress attempting to assist in Maul's assassination of the Dark Lord of the Sith.