Actually, I'd say a couple of guys I think would probably be 2 of the hardest men in the rap industry are Method Man and Redman. I think those two are pretty fuckin' gangsta.
Eminem IS NOT a gangsta. Far from it.
Dre is pretty gangsta. To me...anyone who was raised in the ghetto with drive bys, killings, massacres, drug deals, gang war fare and other obstacles, and made it out of the hood, made something of themselves, they're gangsta for life (except Snoop lol).
Young Buck is TRUE gangsta. I know he's pleading "not guilty" in his case, but c'mon Buck...they got you on tape. Game is gangsta as well. 50 Cent is gangsta. He may be a terrible rapper (with some exceptions), but he is a gangsta. I'm not into to much East Coast rap, though I'm starting to dig Nas. So I don't know too much about EC rappers.