Anakin Skywalker (He'd given up the dark side to do so, and wasn't Vader anymore) and Han Solo are the only ones I can think of.
At the end of Star Wars Episode VI - Return Of The Jedi, which ghosts can Luke see?
What was the weakness of the first Death Star ?
What is the Yoda's qoute?
What? Uhm... could you rephrase that please?