1- Luke Skywalker (DN)
2- Darth Sidious (DE)
3- Exar Kun
4- Yoda
5- Darth Revan
6- Darth Bane
7- Darth Traya/ Kyp Durron
8- Darth Malak
9- Count Dooku
10- Darth NihilusReasons:
- Luke Skywalker actually have surpassed all in the mastery of the force. Those who still don't agree with this fact actually don't know much about Star Wars.
- Darth Sidious was the most powerful Sith Lord ever known and demonstrated some amazing force powers including the deadly "Force Storm".
- Exar Kun was so powerful that he could even defeat Luke, but Luke was lucky to only face his old spirit. But even his 4000+ years old spirit was a major threat to Luke and it took the combined effort of many Jedi Students to end the legacy of Kun's spirit. So, we can imagine that how powerful actual Kun would be.
- Yoda deserves to be at at-least fourth place as he is the most powerful Jedi known after Luke. I can't understand any reason to under-estimate him.
- Darth Revan: Master Kreia once said that "Revan was Power. Staring in to his eyes was like looking in to the heart of the force". Revan has performed many impressive deeds to warrant him a place at 5th spot at-least. And POD Novel has clearly indicated that it was due to Revan's knowledge that Bane became immensly powerful. Revan also knew devastating "Force Lightning Storm" that could kill many opponents in a single blow.
- Darth Bane: Read POD Novel for more information.
- Darth Traya: She has demonstrated us some impressive abilities that are seldom seen in others. But those abilities are not enough to make her reach TOP 5 spots. Kyp Durron also is in this spot.
- Darth Malak: Malak was the 2nd best after Revan in KOTOR and also became a Dark Lord of the Sith. He demonstrated powerful "Force Lightening" like that of Sidious, and "Saber Throw" like that of Darth Vader. He knew "Force Drain" and many other force powers as well. So in-short words, he was a very fine force adept.
- Count Dooku has also demonstrated great mastery in force. He could rip heavy objects from their foundations and throw them on helpless victims to crush them. He was also good at "Force Lightning" and his "Force Grip" was strong as well.
- Darth Nihilus has reached TOP 10 spot here because of his immensly powerful Force Drain technique. But he was not that powerful in actual fight.
LeGend does say Malak is above Nihilus here at least.
I’m pretty sure this is what you’re referring to, Kadash. It was said by Sith’ari, not LeGend.
It made him powerful enough to rule above Sion and Nihilus in a society where the strongest rule, contend with Jedi Master Revan, and tool two powerful jedi knights like they were children...
Your reply and his reply is found here.
http://www.killermovies.com/forums/showthread.php?s=&postid=8046583&highlight=Nihilus+Malak+userid%3A103561#post8046583
But he also said
Revan killed a Sith who was no less then Traya and Nihilus.
There’s no one in KOTOR 1 or 2 as strong as Nihilus.
Also, if this reason provided by ACStyles is why Revan is above Nihilus...it’s horribly weak.
Big whoop the Exile killed Nihlius with help from all sides, and ebat Kreia who's weaker then Revan. We can look at what future era's think of the KOTOR period, Revan is the ONLY name mentioned from the KOTOR era as powerful in POD, Revan is mentioned along with Exar Kun (the most powerful being in the TOTJ era) and Naga Sadow who feat wise also appears to be the most powerful. That alone is enough.
http://www.killermovies.com/forums/showthread.php?s=&postid=8486957&highlight=Nihilus+Malak+userid%3A103561#post8486957