Hard to pick because every official DM screen I ever saw always had unnecessary information, making it cluttered. In fact most of the information on DM screens is unnecessary.
The only good DM screens are the ones you make yourself based on what you think it's uncommon enough so that you tend to forget it, but not so uncommon as to be almost never needed, and this is a personal choice. In addition, the good DM screen doesn't only have rules material but also adventure material and possibly some PC stats (for stuff you want to roll in secret without having to ask the players), and these are group-dependent and change over time! Which leads to my final point i.e. a good DM screen for me can't be just a printed cardboard but something more complicated that can be changed every session, such as a board with pinned papers or a transparent sleeved folder.