I second Tiher R’ Yishmael from Kvartin.
I also like Sheyiboneh Beis Hamikdash from Koussevitsky.
My grandfather was a chazzan, and once recorded some of the parts of the Yomim Noraim davening. His Unesaneh Tokef was amazing! Never mind the tune, but the emotion he had was unreal!
I don’t know if it would be considered a “chazzanus” piece, but I’ve always like the Modzitz Mechalkel Chaim, sung by Ben Zion Shenker. I also like his Uvashofer Gadol.