80s rappers are delusional as fuck. Credit where it's dude, they were the ones that really jumpstarted Hip Hop and put it on the path to greatness, but with the exception of a few like Rakim and LL, most of them were limited as hell when it came to technical ability and the overall quality of the songs they made.
Kool Moe Dee rated himself higher than damn near everybody from the 90s including Nas, Snoop, DMX, and Pun. I don't care how much of an 80s fan or even a Moe Dee fan you are, there is no way you can make a good argument that he is better than Nas.