system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars/Marvel/DC] What single character inserted into Star Wars a year before Episode II most disrupts Palpatine's schemes?

They arrive just on their own, with whatever gifts and tools they normally would have, on Coruscant. For things dependent upon setting like a Green Lantern ring/battery or Speed Force assume they just work. 

Show your homework on how they annoy Palpatine's plans or die trying.
gpt
Anyone with a solid handle on telepathy who gets close to the Senate could probably divine that Palpatine is up to no good, assuming that Palpatine's machinations don't affect the mind-reader the same way that they affect the Jedi, limiting their powers.

Force users can usually just read surface thoughts and emotions, with concerted effort to read much deeper than that. Someone like Professor Xavier or the Martian Manhunter would be quite adept and have shown abilities at mind-reading far better than any Force user has ever shown.

Mages like Doctor Fate and Doctor Strange could, depending on how their magic interacts with the Force, determine that something was seriously wrong with it, and might be able to use their powers to find the source of the issues.