So I'm guessing from what you're saying you don't want true 'old school' like Grandmaster Caz?
If I'm right, we're talking late 80s, early 90s.
Anyways, going along the Dre, Snoop & Cube line,
NWA - Fuck The Police, Boyz N The Hood, Straight Outta Compton, Gangsta Gangsta
For a taste of Ice-T check 6 In The Morning
For a taste of Eazy solo check Eazy Duz It
You cannot fail to enjoy the following albums,
Chronic, Doggystyle, G Funk Era...Regulate
If you're open to East Coast let me know.