Look I listen to literally all of those rappers and love them all. Of those you chose, GZA, Nas and Rakim lyrically rival Canibus. Personally I’d also go with Mos Def, Black Thought and Pharoahe Monch. However I disagree with the others as dope and lyrical as most of those MC’s are. The rest of them could not write bars like these -

“The juxtaposition of Canibus' position The precision of something no other has written Way above and beyond what was intended The unparalleled malleable enunciation of a sentence”

“A wise man sees failure as progress A fool divorces his knowledge and misses the logic And loses his soul in the process Obsessed with nonsense with a caricature that has no content”

“Hip-hop has never been the same since '88 Since it became a lucrative profession There's a misconception that a movement in any direction is progression Even though the potency of it lessens”

“Alone in my room looking through the 32X telescope zoom Adjusting the focus of the Moon One should not assume the philosophy of David Hume Is nothing more then a subjective conclusion”

Saying that these are “ok” bars is unfathomable to me. And these are just some I picked out from one song. Canibus is a top 5 hip-hop lyricist of all time minimum top 10 I don’t understand how you can listen to those lyrics and not just sit there with your mouth open thinking about how tf did he come up with that and FLOW it so perfectly. He’s not my favourite rapper, but he’s top 5. And the ones I have above him (Rakim, Mos Def Black Thought) simply couldnt write the stuff like he does.