if we take the maximalist route with Palpatine... (like some do for Luke too) then I argue this leads to diminishing VADER compared to Palpatine quite a lot. People tend to view Palpatine as more powerful than Vader. That is wrong, Vader is the Chosen One, the most powerful. Palpatine was just brighter and clever to abuse Vader as well as his surroundings so well. But he is not the dark side or as powerful as Vader. close maybe but not close enough. Same for Luke, he is the chosen one's son.. not the chosen one.