Unlike Emperor Palpatine, Darth Vader never seems to laugh. Have there been any offical works, including canon, non-canon, and Legends material, where (post-Episode III) Vader is shown or described as laughing?
According to canon, Vader doesn't laugh. He's not above making dad jokes, but he doesn't even crack a chuckle at his own antics.
Vader does not laugh with him. Vader never laughs. Has never laughed. Not since he was Anakin. And that is a time he dares not remember.
Moving waaaay down the canon scale, his clone is positively manic.
She never had a chance to find out. A dark figure suddenly stepped out of the shadows. The figure had broad shoulders and carried a stone ax. Tash recognized him immediately.
“Offworlder!” Maga bellowed. “Free my people!”
Vader laughed. “Another primitive savage for my labor camps.”
C-3PO: Well, you're pulling on my tummy wires.
Darth Vader: [Laughs evilly]
As so is Darth (pig) Vader from the Angry Birds game.