Since he first started up his own studio in the late 40's, Frank McCarthy has been considered one of the best artists in any genera to date. His early works in ad print and the men's mags of the 50s and 60s was great but he really kicked the art world in the face with his incredible movie posters during the 60s. He unfortunately gave up the pulp art for Western stuff, but even though its not my cup of tea, it is some epic work. Do some Binging and see what you can find from this master!
A true legend in the biz!