I would say that of the European Catholic composers, we sing mostly Palestrina and Victoria, with occasional excursions into the Germans, mostly Telemann, Hans-Leo Hassler and Bach, and the modern French (Faure', Poulenc).
But the 16th century English composers are probably our mainstay. They have the pleasing quality of setting good Latin texts, but nobody set English texts better than they did. Our music director points out the natural declamatory effect of the English in works like Thomas Morley's English/Latin "Nolo Mortem Peccatoris", which we sang for Good Friday.
We do a lot of Palestrina, Victoria, Tallis (a LOT of Tallis), Byrd, Mendelssohn, some Brahms, the occasional Mozart, etc. Easter was Bach overload. Zzzzz.
Fortunately, the guys going through the seminary now are fans of this sort of music. You should have seen what they requested for the Transitional Deaconate Ordination. All good stuff.