Not really, our choir still does Requiem Masses on request, and a friend whose mother died earlier this spring, arranged a beautiful Latin Requiem Mass for her (in the Ordinary Form), but it was another schola singing.
I’m sick of the Missa Angelis (so too is apparently the Vatican’s choirmaster). Most don’t consider, at least the Kyrie and Gloria, to be Gregorian chant actually. It is dated (17th century) much later than the Gregorian period. The Kyrie in particular is too “cheerful”. Too many choirs gravitate to the Missa Angelis because “the people know it”, missing out on other beautiful kyriales such as Orbis Factor (Kyrie XI).
That said, this is a very difficult thread to answer! I have so many favorites from both the Divine Office and the Mass.
I’ll throw this one out though, the Magnificat antiphon for Christmas second Vespers:
Hodie Christus natus est