Echoing the praise for "Sitting In The Park". The amount of research, effort, and pure love put into every episode was staggering. Nothing has had a bigger impact on my understanding of soul music.
I like the "Lowrider Sundays" show on dublab . Not always group harmony sounds, but definitely tends towards the sweetier side, with the odd bit of doo wop as well. They've had some great guests like Ruben Molina & George Miller