We're not talking solely about the singers here. We're talking about the entire Sunday in the Park with George acting company — aided, abetted by and integrated with the entire production staff and director Rob Ruggiero. And we're talking about the unstinting support that all these visiting artists received from the Repertory Theatre of St. Louis staff. Everyone involved came together in rare harmony to make Stephen Sondheim and James Lapine's musical a sublime theatergoing experience. Even the program notes by art-history professor Jeffrey Hughes were evening enhancing. There's a maxim that if a play or film is going to work, everyone has to want to tell the same story. Sound easy? Think again. "Art isn't easy," Georges Seurat complains in Sunday in the Park with George. True, it's not. But when, ever so rarely, everyone is an integral part of telling the same story, as everyone was in this stunning Rep production, the result can be ineffably beautiful.