https://youtu.be/ZQNIa6VhHoY https://youtu.be/0OxmMYXJ8V4 https://youtu.be/0FVPQzKw9bk https://youtu.be/omZs1q0wnIs
https://youtu.be/ZQNIa6VhHoY https://youtu.be/0OxmMYXJ8V4 https://youtu.be/0FVPQzKw9bk https://youtu.be/omZs1q0wnIs
I just think some of your recommendations, such as Novos Baianos, Gilberto Gil, and Maria Bethânia, aren't exactly bossa nova singers.
I’d recommend João Gilberto (who was married with Astrud) and Miúcha. Elis Regina has an astonished album recorded with Tom Jobim in 1974, “Elis & Tom”.
This is a popular tradition of in company (in backyard -- hence the band name "Fundo do quintão"), and to me this is one of the last genres of music that you can sing together, a capella. They have melody and the text is just right for a human.
Close - it's Fundo de Quintal [1]