Originally posted by Lord Stark
But certainly not within the composite canon mythos which has the likes of Yoda moving mountains.
He moves mountains in Canon? When?
Anyway, Luke's projection feat particularly stands out because it's in a medium where demonstrations of the Force are consistently toned down. We can wait for the literature for more (there's already that passage where Luke brings down a star destroyer, but it's not clear how embellished it is).
Thanos is explicitly stated as being the most powerful being in the universe, and we know he can wield Infinity Stones.
Ah, so accolades do matter. Then we know from in and out of universe accolades that Luke has the potential of his father, or close to it, and it's not difficult from the fact that he was matching Vader in 1.5 years of training to infer that he has surpassed Sidious, let alone Dooku.
In comparison, Luke simply has "one of the most powerful Jedi" which is an accolade that is given to everyone from Kit Fisto to Mace Windu. +Luke as per Yoda has barely even read the Jedi texts.
The texts in those temple I'm pretty sure very few characters have ever read, given that its location wasn't on the record.
Compared with someone like Dooku who has been a member of the Jedi Council and had access to the vast collection of knowledge in the Jedi Archives. I don't see Luke as superior to the likes of Windu and Dooku who sat on the council and had access to a cornucopia of knowledge.
In knowledge it's debatable (we don't know what Luke does after RotJ - in Legends for example he probably has more knowledge than Dooku or Windu). But in raw power it's not even close. There's a reason why Sidious wanted to replace Vader with Luke.