Not exactly what you may be seeking, but I recommend you check out Die Singphoniker, a six-voice all male group. I've got several of their CD's which include discs dedicated to the likes of Haydn, Schubert, Mendelssohn, etc. Here's a link to one of their CD's on Amazon: https://www.amazon.com/Complete-Songs-Male-Voices-1/dp/B000001S1D
You can also view/listen to their YouTube offerings.
You can also view/listen to their YouTube offerings.