The golden glow of success has gathered around Thomas Blackshear II (b. 1955). Last September his painting Swan Song was a smashing success at the 14th annual Jackson Hole Art Auction, where it sold for $77,350 — more than double its high estimate. That same week, Blackshear’s painting Hunter’s Watch appeared on the commemorative poster of the Jackson Hall Fall Arts Festival and then sold for $37,000. The following month, he was inducted into the Society of Illustrators’ Hall of Fame, an honor previously accorded to such legends as Maxfield Parrish, Norman Rockwell, and Dean Cornwell. This past March, three new Blackshear paintings — The Wait, American Nobility, and Native American with Feather — appeared in the Masters of the American West sale at Los Angeles’s Autry Museum of the…