A Thousand Paths Among The Stars

Harry Potter, newly appointed Captain of the Marauder and son of the famous Captain James Potter, was falling apart at the seams. His crew didn’t respect him, he was lost in the empty expanse of space, nightmares plagued his sleep, and his Commander deserved the Captain position more than he did. Good thing multiple attempts on his life and a vicious warlord after his head was all it took to turn it all around.
Alternatively, that space fic in which Harry Potter almost dies too many times, Tom Riddle slowly becomes the most smitten fool on the ship, and the rest of the crew are all just a bunch of assholes with popcorn watching the show. And exploding ships, don't forget the exploding ships.