You should finish this list man.
I've been re-acquainting myself with old school hip-hop the last few days and I plan on checking out the stuff on this list I haven't heard, which is just about all of it.
I used to listen to really shitty rap in early high school along with a little bit of old school stuff, but then I stopped listening to it altogether. Now I'm coming back to the old school stuff and want to branch out and hear some more good hip-hop.