I found a few more books to add to the database.
It’s worth noting that The Greatest Flash Stories Ever Told is a different collection than The Flash: Greatest Stories Ever Told. There are a few examples like that. The second series is more recent and runs well through modern times, the first one came out mostly in the 90s and tends to stop around the 80s in terms of its contents.
Most people are probably familiar with the second series, since those books all had a nice unified design and Alex Ross covers. I’ve included both sets in the Greatest Stories Ever Told list, of course.