TFA’s poster is a mess. Too many people crammed into a small space.
I vastly prefer the SE posters to the originals for the same reason I call the first film A New Hope; it feels much more unified.
The Prequel posters are fine. Nothing groundbreaking, but they do a good job.
TLJ has a fantastic poster, taking full advantage of the stunning visuals of Crait, while positioning Luke, Kylo, and Rey brilliantly.