Garrick Ohlsson was back a couple of days later, looming large over Mendelssohn’s fragile G-minor Piano Concerto, which, truth to tell, might better have profited from somewhat more tinkle than roar. But the roar was also supplied in impressive measure by the Philharmonic and its guest conductor, who used to be more often in our midst, the American-born, Swedish-raised Herbert Blomstedt, who delivered the Fourth Symphony of Anton Bruckner in a beautifully shaped, clear-visioned performance full of the good sense and excellent balance that earned him his staunch following in his San Francisco days. Aside from a passing bad moment among the horns — including a muffed opening note that surely must go into St. Peter’s book — the orchestra rose well to his urging. The sound of Bruckner’s scoring in Disney Hall is one more reason why they didn’t really need that other organ.?