The Googles I mentioned should all have them.
The fourth movement of Beethoven’s Ninth Symphony, the second half is the chorus. The China Symphony Orchestra Choir sings this with ease. It's the melody of that Ode to Joy. It’s definitely a big chorus, a chorus sung by adults, absolutely world-class.
requiem (K626), Mozart, a complete set, definitely sung by adults, cantata, world-class
Messiah, a complete set, I don’t need to say this
Hunter's Chorus, which is also familiar to Chinese symphony singers
Hochzeitsmarsch (Lohengrin, R.Wagner) Wagner's Wedding, sung by adults
Jesu, Joy of Man's Desiring - Bach (Choir Of King's College Cambridge), it should be available on Google, cantata, sung by adults
Also Ave verum Mozart
Top twenty? This ranking is not uniform...