AKA Pella is very goyish.
Maccabeats – quite goyish, but some very nice songs which are not goyish at all.
Berry Weber – Farbreng Vocal Edition quite chassidish.
Chazak Productions – (Shabbos Tish, Shehasholoim Sheloi) quite chassidish, but very enjoyable.
The Chevra – extremely professional, not chassidish but not at all goyish.
Kol Zimra – all different styles; give it a try.
Lev Tahor is great; great hits sung in acapella.
Yosef Moshe Kahane “Chassidishe Oitzros” is also very well produced, but Chassidish to the core.
Yochi Briskman made an acapella albulm called “Hamakala”, but I haven’t listened to it.
(See also Mona Rosenblum “Philharmona Vocal”; Meshorerim “Ymei Sefira”; Dudi Kalish; Beatachom)
I think YBC have an acapella albulm which is supposed to be brilliant. Miami have an albulm called “Around the Campfire” which is fairly good.