Over the last half century the hierarchy of Abstract Expressionist painters has become solidified and rigid. At the pinnacle are Jackson Pollock, de Kooning, Rothko and Newman. Reinhardt, Kline and Mitchell occupy the next tier. Over the decades, various exhibitions have argued for the elevation of Gottlieb, Krasner, Pousette-Dart, Cavallon, Tobey, Marca-Relli and Frankenthaler. Yet only that master of shifting, ironic form James Brooks might arguably be raised above the pack.