A year late, but I found a fic with a good luke as the emperor's hand.
Read blank 101s son of sons triliogy. VERY well written Palpatine.
Basic plot summary, is Luke is captured by Darth Vader, much to everyone's disadvantage.
link to the first story.
HTML:
<a href='http://www.fanfiction.net/s/4302076/1/' target='_blank' rel='nofollow'>http://www.fanfiction.net/s/4302076/1/</a> [/htlml]