I am no expert on graphic design but it doesn't take an expert to know what images are striking and which are not. On a recent trip to Lisbon I had the pleasure of talking to Robin Fior, now I had no idea who he was, turns out he is a graphic designer who used to work for International Socialism, the precursor to the Socialist Worker. These are a few of his covers.
He also worked on propaganda for Betrand Russel's break away direct action group from the CND, committee of 100 with Ken Garland.
While searching for Robins work today I came across this.
Even some of the better pieces of recent political propaganda like the COR poster for 26th March.