Frank Frazetta’s work made such an impact that director George Lucas asked him to do some work on the Star Wars films. Unfortunately retaining rights was equally important to Lucas and he refused to allow Frazetta to keep any of his originals and so Frank turned him down.
http://www.stainlesssteeldroppings.com/category/the-artisan-series
George Lucas later claimed that Frazetta's artwork for Buck Rogers was the inspiration for the Star Wars Saga.
http://www.arthistoryarchive.com/arthistory/fantasy/Frank-Frazetta.html
Tom Jung's Style A poster is definitely made to resemble Frazetta's work. Don't know if Lucas approached Frazetta to do poster work though.