The word genius is used too much these days however Ian Curtis fully merits it. That he wrote some of those lyrics at the age of 21/22 is breathtaking.
I know bjd and I disagree on this but, for me, New Order were a painful bar stewardisation of Joy Division. At least they changed the name but I still couldn't stomach the move from the raw pain and power of Joy Division to the New York electric sound of New Order.
There isn't a single writer to better him since he died.