Let's be honest, we all know that Apocalypse War is going to win this, hands down. Not just this round either. Easier to acknowledge this right now and focus on who are going to be the runners up.
You have the Grover / Ezquerra team at their absolute pinnacle. More iconic scenes than you can shake a stick at, death and destruction on a massive scale, Dredd's drive and determination to do whatever it takes to protect his city ... and that's just focusing on the main tale.
Expand to include Block Mania and you add in a roster of the greatest Dredd artists of all time. Even more iconic scenes, death and destruction, "I'm with Rowdy Yates ..."
Let's face it, AW / BM is the yard stick against which all other 'epics' are judged. It's legacy has been felt for literally decades. It is a seminal piece of work.