Which albums best display a rapper's skills?

It seems like artists used to just make a collection of songs, put them together and release an album. After a while, it seemed like emcees felt the need to prove that they could do what other people were doing. For example, after Slick Rick, everyone wanted to show that they could successfully tell a story on a track. After Gza displayed great wordplay on tracks like "Labels," "Fame," etc., a lot of rappers started focusing more on wordplay. Blackalicious dropped "Alphabet Aerobics," and then Papoose did "Alphabetical Slaughter," etc. In the late 90's, almost every East Coast artist reserved one track to show that they could rap fast. When Canibus dropped "100 Bars" to show off his breath control, the Game dropped "300 Bars," Joell Ortiz dropped the "125 Grams" series, etc. So which album do you think best encompes all or some of these skills (in addition to other skills) to show that the emcee is the complete package?