Legends Never Die by R.A The Rugged Man
Some of my favorite deep rap albums would be : 1. I'll Sleep When You're Dead by El-P 2. God's Son by Nas 3. Marshall Mathers LP by Eminem (it also gets deep time to time but I wouldn't call it a totally deep hip hop album but a blend of sad and aggressive emotions). Apart from these you can check Immortal Technique's discography the guy goes hard and deep time to time in his albums.
Well not all of his songs are emotional, but Joe Budden has a ton of introverted, deep, emotional stuff... some of his deeper projects are; - A Loose Quarter - Mood Muzik 4 - Mood Muzik 3 - Mood Muzik 1 - Padded Room - Escape Route - Padden Room - No Love Lost (although this is his worst album IMO, there are still a handful of good songs)
