I just came back from summer vacation.
Part of it is a yearly music week which we join with the whole family. It's mostly amateurs, with some more or less pros in between (like myself).
This year I only joined the chamber music part because the orchestral piece was without trombones and I had no interest in playing the orchestra and choir piece. (Schubert Eb mass. Would have had to prepare quite a bit on alto and didn't find it nearly interesting enough to do that)
At the end of the week the conductor asked me if I had any suggestions for repertoire that would be interesting for trombones.
Requirements:
- Either purely symphony orchestra or orchestra plus choir or e g trombones or brass plus choir and/or organ
- Not too many special instruments. E g it never had a harp since 2018
- Playable for a very mixed level of musicians
- Trombone parts (or 1st trombone) can be challenging

- It has to be somewhat "conservative". Many people there are somewhat averse to any kind of newer music. Also - while I am not a fan of it - there is a tendency towards Christian choir works
- Still some out of the box ideas would be great!
Some examples:
- Bruckner Ecce Saccerdos for choir, organ and three trombones
- Classical and romantic overture, e g Freischütz, Meistersinger, Ruy Blas
- Dvorak or Brahms symphonies
- Bruckner Requiem
Would be great to get your ideas!