*RANT ALERT*
Please let me know if there's any albums that I should check out. Thanks.
Your list is most of what I like.
Here are some more I personally enjoyed (YMMV). Some are plain singing, but done well (like kumzits in the rain)
Freidman family: my zaidies zmiros.
Beri weber's farbreng vol. 2 (the acapella tracks obviously)
Acappella Kumzitz by Kleinfeld, Itsi & Silberstein, Tzvi
Lol zimra - the music of Abie Rotenberg.
The s'fira album, Dachs and Williger.
The acapella Treasury - Shabbat
(Y-studs, if you are into that)
Please add more if you think they are alright.