Barry Mulholland and Jim ButzIn 2010, Jim Butz played the title role “Hamlet” at Shakespeare Festival St. Louis — a dazzling performance that brought him his second Kevin Kline Award. The first was for his portrayal of Mark Antony in “Julius Caesar,” also at the festival. Counting from his performance in “Lobby Hero” at the Repertory Theatre of St. Louis, Butz managed in just five years to establish himself as one of the most thoughtful and persuasive actors in town.