Originally Posted by
Dr. Ellingham
For a long time, there was a somewhat notorious Bronze Age (1971) cutoff with trades. Not sure DC ever formally addressed why, but the theory was that they needed to work out royalty agreements for all creators whose work was being collected, which was a nightmarish legal undertaking. That was (apparently) resolved a decade or so ago.
Around that time we saw the first satellite JLA trade - a George Perez-themed hardcover. And I think a volume 2 as well. But nothing since.
The consensus is usually:
1. Len Wein
2. Steve Englehart
3. Early-mid Conway
I'd say Conway hit his stride around the time Zatanna and Firestorm joined the team. Either way, once George Perez left the book in the early 200s, it went downhill.
I've been waiting for a nice hardcover collection of this stuff for a long time. As well as Englehart's Batman. That one is coming next year, thankfully.