Curtis MayfieldCurtis Mayfield is the perfect combination of funk, soul, and R&B, at least for me.
I've been listening to The Very Best of Curtis Mayfield for weeks now. Mayfield, wrote quirky, intense songs with tremendous beats, and here are a few examples:
Those songs are also all on the Superfly soundtrack, which is fantastic in its own right (and more funk-oriented, which is never a bad thing. Ever.)