Amerigo Gazaway - Fela Soul - Fela Kuti vs. De La Soul is an album I still listen to regularly. Feel Good Inc. is a stand out.
All 3 Beastles albums by dj BC are really well done: dj BC presents The Beastles, Let It Beast, and Ill Submarine
Sweet Jane (With Affection) by Two Nice Girls isn’t a mashup, per se, but a blending of Velvet Underground’s “Sweet Jane” with Joan Armatrading’s “Love and Affection.”
My gf tried it. When I asked her how it was, she just said “mmm mmm mmm.” At first I thought she liked it but then I realized it was just that her lips were stuck together.