Don't sleep on LL Cool J
Also, when I was in high school, Kool Moe Dee was going at LL. LL was better at picking beats, but alot of people said Moe Dee was the superior MC. I always favored Cool J imo.
And then there was Chuck D & Ice Cube.
So it was
Rakim
KRS
Kane
Slick Rick
Kool G Rap
LL Cool J
Kool Moe Dee
Chuck D
Ice Cube
Special Ed/GURU (tied)*
That's the top 10 from when I was in high school from Sep 87-June 91
*Special Ed and GURU both had 2 albums by the time I graduated. But I don't remember anybody calling them The GOATs, but they both had 2 albums by my senior year.
Edit. And Grandmaster Flash & he Furious 5 (Melle Mel) and Run DMC were both kinda washed up by the time I entered high school.