Pierre Monteux conducts Bruckner
One such case of the latter is Pierre Monteux (1875-1964). Monteux was known for his insightful interpretations of French music and for being the conductor at the riotous premiere of Igor Stravinsky's "Le sacre du printemps."
However, Monteux did hold some music director positions and that required him to venture into repertoire with which he was not as familiar. Monteux had a long affiliation with the San Francisco Symphony Orchestra and in May of 1947, he lead the orchestra in the San Francisco premiere of Bruckner's Symphony No. 7.
Unfortunately, I missed it, since I was three months old at the time and living in Brooklyn, New York.
My thanks to Doug Rea for bringing this to my attention.