In my opinion, Bob Dylan did the first “rap” song.
https://youtu.be/_CJHbfkROow?si=UeSgKZchA9Hb0fgp
I consider this the first rap song...
https://www.youtube.com/watch?v=e58NJU5B3v8
It sounds like it. At least the primitive rhyming part. There’s a newer/older iconic one also. It was Billy Joel’s “We didn’t start the fire.” A bit more sophisticated in poetic license but still a rapid-fire staccato essay, IMO.