I came across this fantastic resource of really interesting poster designs. With a range of styles and types of poster designs from designers around the world, but with consistent quality, that you can search through, this is sure to be a site that all designers should bookmark.

The typo/graphic posters project as described by them:

a passionate project focused on the design community that aspires to be a timeless
source for studies, inspiration and promotion of good design through poster culture
and cultivation of typography and pure forms of graphic design.