the idea of 1 band, etc is kind of the basis of a podcast I recently checked out through a user on rateyourmusic.com
There's 2 hosts, a guy and a woman. The taste of the woman on there, doesn't totally crossover with mine, but I have found a few of the one's they've done to be interesting (Faith No More, Godpseed You Black Emperor, System of a Down, etc).
I would check out the "Artist Deep Dives" from Velocities in Music (through their site and YouTube Channel) as well though.
Mind you, like many podcasts, these are rather LONG, extensive discussions that can go well over an hour at times.