I would say your next rap concert experience should probably Onyx but they mostly tour over seas these days. Just to give youa taste of their music I would say check out their All We Got Iz Us Album, I think its their best album & they would later influence groups like I.C.P. & other horrorcore artist, but teah check em out.
If you look up Necro & who he was inspired by, its a rapper named Kool G Rap. Check out the BeeShine & The what inspires Necro vid. Kool G Rap was a early 90's rapper who could create punchlines for days. The album you will catch him doing this on is [Wanted Dead or Alive] he later would influence more known rappers like Mf Doom & Big L. Oh, check your notations on your phone when you listen to the album just to see how versatile he is. I was also wondering if I gave you some albums to review would you be interested? I only give request like this to people who will give info on the album & artist, this is my way of getting these albums more known & I promise you want get bored researching & listening to them.