Two movie posters that I think work particularly well are from West Side Story and Jaws. Fourteen years separated these films (1961/1975) and the posters reflect that stylistically.
This West Side Story poster was released after the film won 10 Academy Awards. It is very busy graphically but I think it is arranged in a cogent manner considering the amount of information they put forth. My eyes were first drawn to the red text, which made particular lines and words ‘pop’, most notably the word best (sell that film!). Red also symbolizes the film’s themes of passionate love within a fiery Latino community. The bold and gritty title graphic stands up well to the red and cleverly utilizes the lovers dancing on a fire escape, echoing the New York locale of Spanish Harlem. All the text is logically connected, sized and grouped. The addition of photographs, placed on a diagonal as they are, have the effect of giving the illusion of depth to the poster, the z axis at work. I’ve also included a Japanese poster that I liked for the simple linear perspective it employs.
The Jaws poster achieves its intent in a very simple but effective way. It creates and plays on our fear of what’s lurking beneath the surface? This poster answers that question with a ridiculously oversized image of a shark, mouth agape, with rows of razor sharp teeth making it’s way toward an oblivious swimming woman. The image makes text nearly superfluous, but for the addition of a bold blood red title and a liberal sprinkling of the word terrifying. Finally, the layout of the actors names serve to mimic the upward thrust of the shark. 
