Emperor Revan
Most Powerful Sith Lord
It's not like Revan was powerful or anything. (Even though Wikipedia, the Free encyclopedia says that Revan is thought by many to be the most powerful Sith Lord of all time) Ragnos or any ancient Sith for that matter would easily fart and destroy Revan and everyone else of his time (1,000 years later) [Even as a padawan, Revan's teachers were sure that he would become a champion of the Force. His master Kreia said "Revan was power. Staring at him was like staring into the heart of the Force.” Revan had a lust for knowledge, seeking out every piece of information he could about the Jedi. Revan is an extremely quick learner, doing in weeks what many cannot do in years. Master Zhar even goes as far as saying his potential is unlimited.
Revan has the highest level of Battle precog, has the Will power to resist the Dark side of an entire planet that no one else (not even Kreia) could resist, controlled an enormous space station that siphoned the power of a star and killed hundreds of other Sith who tried to control it, is perhaps the greatest tactician ever, has enormously high potential, plunders all the knowledge he could from the Jedi temples, he plundered tombs, relics, artifacts, and knowledge from a planet sized Sith storehouse of knowledge, learned dozens of ways to kill or turn Jedi/Sith, fights for 6 years straight as the leader of one of the main forces in the two different wars against powerful opponents, killing Mandalore and the strongest Echani, and was considered by Kreia (Revan's mentor who could kill three Jedi council members at the same time with one use of the Force) to be the heart of the Force.
Then he loses all that power and becomes a Jedi again, he plunders Korriban, including the tombs of four very powerful dark lords, gaining their artifacts, learning from Tulak's holocron, killing two tarentateks at the same time by himself when just one could easily kill a Jedi, he killed everyone in a Sith academy that he started, he killed the best bounty hunter at that time, a Sith Lord, he killed hundreds of dark Jedi and assassin droids, defeated and killed his apprentice Darth Malak at least twice in a row, and became even stronger than he was during his first reign (first paragraph).
Then he recovers all his memories and knowledge from Malachor V, the Jedi temples, etc. increasing his power greatly from the second paragraph, before he goes to fight the ancient Sith empire single handedly.]
Like Illustrious said, Ragnos would fry Revan with a lazer blast from his scepter (which barely hurt Kyle Katarn.)
Congratulations to those who actually read all this. For the slow ones who didn't figure it out, most of that was sarcasm except the in parenthesis parts. Don't you guys think you're making Ragnos out to be a God even though we have little knowledge of him at all? I know Ragnos must be powerful, but saying that he would nod and Revan would kill himself? I like Revan a lot, but I know he has limits and even in close fights if I think he will lose, I post it. I know there are others that can compete with him, or are perhaps even stronger. It just really irritates me that people think this guy we know almost nothing about who has only defeated one person we know of for sure in actual combat, is invincible even if you guys are exaggerating at times.