Marva Whitney had that powerful screech like JB. I’m Tired is an R&B soul shaker and You Got to Have a Job is a funky popper. Both jams are on the conscious tip. Bobby Byrd released You Got to Have a Job also in 1970.
You can find more about Marva here in Wikipedia.
I’m Tired, I’m Tired, I’m Tired:
You Got to Have a Job: