In these difficult times, we need a bit of Sister Rosetta Tharpe, I think (who appears to be wearing my Nan's best coat).
She started out a bit churchy, but then started playing secular stuff, so the church went off of her a bit. Much copied by the likes of Chuck Berry etc. She really did start the whole thing/sound years before anyone else.
C'mon, we grew up in the 70s... bath night was Sunday, ready for everything clean and fresh on Monday...