Mauro-Cottone (SATB in Marier Pius X; very easy)
Rheinberger (2 - part arr. in Rossini’s « Canticum Novum »)

S×4, Ax4, Tx3 Bx2, but attendance is spotty. We do the Dubois and Arcadelt. I also looked at Elgar, Parsons, and Dubois. The Dubois has deceivingly tricky entrances if your members learn by rote. You also need good tenors for the Sancta Maria section. There are also a lot of unprepared entrances or leaps to a dissonance which are difficult.

Looking back I wish we had done Elgar, because I think we could have done it better than the Dubois. The Parsons I think is also doable of you have a choir that does some ground work with practice videos. We didn't have the time for a major challenge when we learned the Dubois, however.

liam, thanks for your comments -
the Elgar score I see is accompanied, which would reduce our already small ranks, so it's probably going to be out for us.

I will go look up the rest of these. thanks all!

The Ave Maria is one of the few Perosi works with which I am familiar and enjoy, this and his Ecce Panis Angelorum

Ave gratia plena of Cornelius Verdonck is our go-to Ave, even though it does not set the full traditional text. (Nice recording here.) It's great to tell the choir that the music is uniquely preserved on a copper engraving from 1584.

Besides the ones listed above, I've also sung SATB settings by Mouton, Palestrina, Fogliano (arr. for SATB), and have programmed the Guerrero for a Mass on February 11 (Our Lady of Lourdes).

If you have two strong voices you can do the Saint-Saens, or the Faure...Chorally speaking, the Monteverdi is only 3 part but you need competent singers.
For SATB, there is the Victoria, Elgar, Arcadelt, etc...if you have more singers you can try the adaptation of the Rachmaninov (from Vespers)

Parsons - á 5
Palestrina - á 5
Victoria (Handl-Gallus) - á 4
Arcadelt (NAM edition) - á 4
Willaert - á 4
Josquin - á 4
Taverner - á 5
Guerrero - á 4

My SATB setting, composed in memory of my daugter-in-law's father. Also available at CPDL.

N.B. The final Bass low E may be taken up an octave.

I once sang a setting by Albert Dooner that I liked. It's tonal with some "mildly modern" harmonies (7th chords and chromaticism) in the middle, and an unusual cadence at the end. It was published as one of "Three Canticles" by the St. Gregory Guild in 1954.