As you already have a Patricia Barber album on your list, I'll exclude "Companion", which I think is excellent.
These may seem like an off-beat list, but I consider each one to be an excellent example of the genre...
Feist – "Let it Die"
Fela Kuti – "Expensive Shit"
Mouth Music – "Mouth Music"
Jude Swift – "Common Ground"
Tower of Power – "Back to Oakland"