OT Era Ranking List
Notes: I will not be listing entities above Valkorian in this list or lists like this one in the future.
1. Sidious: While a master of all lightsaber forms and the most powerful force user in the Galaxy at the time I feel that his apprentice surpasses him in technical skill due to the Emperor having little opportunity to employ his saber skills throughout the decades since his mastery of the forms. Still Sidious is the most powerful being in the Galaxy at this time supported by his musings of dismantling the Imperial Palace and his ability to create Force Storms by this point in time.
2. Vader: Though Vader faced challenges adjusting to the limitations of his suit and his own mental state after the events of RotS the Dark Lord became more powerful then he ever was as Anakin Skywalker despite the limitations imposed on his potential. Such examples of this power include collapsing a cathedral containing a labyrinth beneath it before subsequently growing in power in the years between that feat and Return of the Jeid. Vader is without a doubt the most technically skilled duelist of the OT era having both the knowledge and experience of Jedi General, Anakin Skywalker and Supreme Commander of the Imperial Navy, Darth Vader. Turning his handicaps into advantages Vader reworked his fighting style to incorporate 4 forms of lightsaber combat ( Soresu, Makashi, Ataru and Djem So ) in a reworked variant of Djem So. Vader is also one of the most physically powerful characters in the mythos, crushing stone pillars by flexing his force enhanced cybernetics along with other incredible superhuman feats.
3. Galen Marek: One of the most powerful Force users in Galactic history it is my belief that the onetime apprentice of Darth Vader exceeded his master, even as of RotJ, in raw force power, though not by much. His feats are nearly unparalleled in the mythos only being rivaled by the the likes of Vader+ tier force users. As for lightsaber combat he was able to tire Vader as of TFU out in a duel despite having fought his way through Imperial forces shortly beforehand and being injured days beforehand placing him as one of the best duelists of the era. His physicals are even greater then what you'd expect from a Force user possibly above Vader in potency and a youth in his physical prime. He has survived blows from objects that would have killed any non force sensitive and even tanked lightsaber wounds before being rebuilt even stronger then before. His endurance feats are some of the best in the mythos only being rivaled by Vader and Maul. He has matched Vader's strength and exceeded him in speed. He's even been stated to have the potential of Luke Skywalker someone thought to have had the potential of the Chosen One by George Lucas.
Gethzerion: Successor of Talzin as the leader of the Nightsister clan on Dathomir she seems to have inherited her predecessors power as she was viewed to be a great enough threat by Sidious to warrant putting the planet on lock down and sealing it off from the rest of the Galaxy. Her feats support her hinted at capabilities as she is able to call down lightning storms, hurl boulders and even dominated a post RotJ Luke Skywalkers ( who was admittedly caught off guard ). Truly an impressive Force users and one that rivals the likes of Prime Vader and other top tiers of the era.
TBA: Cronal, Luke, Jerec, Ferus, Kar Vastor, Rahm Kota, Shaak Ti, Kazdan Paratus, etc.
Requests: For more obscure characters like X1 and X2 I'd ask experts such as FatedXtasy for their imput. It would be appreciated greatly.