Secret Six
Shazam
Animal Man
Dial H for Hero
Doom Patrol
R.E.B.E.L.S
Green Arrow
But this is primarily based on the people around me personally. I know I will never convince them to read a Superman story, and I also know that they are interested enough in Batman that if I were to get them into DC comics in general they would find their way to Batman eventually. My people lean towards quality stories that feel both niche and complete.