In my mind, Rebel is the definitive Heavy Metal post-apocalyptic series. It’s set in NYC and the main character is a former soldier who is home from the war. 

It’s also got three separate writers credited, along with Pepe Moreno (the artist).

(Heavy Metal issue #96, March 1985 – Page 26 Rebel by Hingley, Sylvester, Ciccone and Moreno)