Shepard began his acting career in earnest when cast in a major role as the land baron in Terrence Malick's Days of Heaven (1978), opposite Richard Gere and Brooke Adams. This led to other important film roles, including that of Cal, Ellen Burstyn's character's love interest in Resurrection (1980), and, most notably, Shepard's portrayal of Chuck Yeager in The Right Stuff (1983). The latter performance earned Shepard an Academy Award nomination for Best Supporting Actor. By 1986, his play Fool for Love was getting a film adaptation directed by Robert Altman, with Shepard in the lead role; his play A Lie of the Mind was being performed Off-Broadway with an all-star cast (including Harvey Keitel and Geraldine Page); and Shepard was subsequently working steadily as a film actor. These achievements, together, put him on the cover of Newsweek. Over the years, Shepard taught extensively on play-writing and other aspects of theater. He gave classes and seminars at various theater workshops, festivals, and universities. Shepard was elected to the American Academy of Arts and Letters in 1986, and was elected a Fellow of the American Academy of Arts and Sciences in 1986. In 2000, Shepard decided to repay a debt of gratitude to the Magic Theatre by staging his play The Late Henry Moss as a benefit in San Francisco. The cast included Nick Nolte, Sean Penn, Woody Harrelson, and Cheech Marin. The limited, three-month run was sold out. In 2001, Shepard played General William F. Garrison in the box office hit Black Hawk Down. Although he was cast only in a supporting role, Shepard enjoyed renewed interest in his talent for screen acting. Shepard performed Spalding Gray's final monologue, Life Interrupted, for the audiobook version, released in 2006. In 2007, Shepard contributed banjo to Patti Smith's cover of Nirvana's song "Smells Like Teen Spirit" on her album Twelve. Although many artists had an influence on Shepard's work, one of the most significant was actor-director Joseph Chaikin, a veteran of The Living Theatre and founder of a group called the Open Theatre. The two often worked together on various projects, and Shepard acknowledged that Chaikin was a valuable mentor. In 2011, Shepard starred in the film Blackthorn. Shepard's most recent movie appearance is Never Here; it premiered in June 2017 but had been filmed in the fall of 2014. Shepard also appeared in Bloodline between 2014-2017.

Answer this question "What was his most memorable role?" by extracting the answer from the text above.
most notably, Shepard's portrayal of Chuck Yeager in The Right Stuff (1983).