1. Giffen/DeMatteis JLI
2. Meltzer/McDuffie/Benes
3. Post G/D, Jurgens/Jones et al. (don't kill me!)
4. Robinson/Bagley era. I recently picked up a set of used trades, and re-read this run for the first time since publication. It's pretty damn good! I think being aware of all the mess behind the scenes at the time (and Cry for Justice! existence) hampered much of my enjoyment the first time around.