i don't think darth sidious was all that powerful, he just had the right ideas for what he had going for him. he olny really got into one fight one on one with master windu, and if anakin didn't step in then sidious would have died, but then the movies would have been over.
Yeah, there's far too much to support that the Emperor was the most powerful Sith and, at the very least, that the dark side was the deepest with him. There are quotes from canon sources out the yin-yang to support it.
1.) First off, Luke defeated Sidious; being 'defeated' is not the same as being 'owned'. 'Ownage' implies an easy fight or victory, such as what Anakin did to the Separatist leaders or what Darth Sidious did to to Mace's crew in RotS.
2.) Evidence strongly points to Luke being assisted by Leia via battle meditation or some varient in the final lightsaber fight with Palpatine, since a.) Sidious curbstomped him prior, b.) was on the verge of beating him in that duel, and c.) Leia told Luke that she had "already" joined her power to his.
3.) Sidious was still far more powerful than either of them in Force strength, and the only reason he died was because Luke, Leia, and Anakin combined their Force strength [three Skywalkers? That's pretty much unprecedented in terms of power] and isolated Palpatine from his Force Storm.
4.) Sidious, on his deathbed [where every single usage of the Force accelerated the decay of his clone body], curbstomped Luke's forces attempting to stop him and disabled Leia. He was only stopped when Brand and "all the Jedi before [them]" entrapped Sidious's spirit as they merged with the Force.
Nihilus goes back LucasArts' file of antagonists reserved only for unoriginal, desperate, pressed-for-time games.
__________________ Recently Produced and Distributed Young but High-Ranking Political Figure of Royal Ancestry within the Modern American Town Affectionately Referred To as Bel-Air.
Galactic conquest is kinda...old. But that's not the objective of any of the Sith Lords in the game. One Sith has degenerated into a primal force of darkness, another sets her sights as boldly high as destroying the thing that rules all life and the other while shallowly nothing more than hate and anger, has a deeper core to his emotions and minset.
Not to mention the background of Nihilus and his origins leave much room for development.
__________________ "No, when Luke uses anger he turns into Stevie Wonder at batting practice."
__________________ Recently Produced and Distributed Young but High-Ranking Political Figure of Royal Ancestry within the Modern American Town Affectionately Referred To as Bel-Air.
lol since when? Aside from Revan and Kun who could be as strong as the ancients, we don't see anyone that's uber elite. In fact, all of them learned ancient sith techniques, yet Revan is the only one with vast ancient sith knowledge. I fail to see how any one of them can challenge the most powerful DLOTS of the ancient sith who ruled over a century during the pinnacle of dark side power. I don't see any other sith other than Sidious achieving close to that.