Naw, Jay was riding waves/artists throughout his career.
From Biggie, to Kanye, to Beyonce, to Justin Timberlake, Linkin Park, etc..
Hov was chasing hits and relevancy.
While Nas was still puttin out quality music like Distant Relatives, Life is Good, Untitled etc.
Breh, let it go. Nas is great without having to downplay Jay Z.
Out of that list, Biggie is the only artist Jay Z came up off of. When JT came back off a 7 year hiatus, he got Jay to feature on HIS comeback record. When Beyonce's solo career took off, Jay was featured on the record that blew started her solo run. Most posters on here did not care about Kanye until "This Can't Be Life" and "Izzo" was Kanye's first hit song as a producer. The first time many heard Kanye rap was ona Jay Z album. Linkin Park ain't even woth mentioning because it was a mash up album. More importantly, Jay Z was a already consistently going multi-platinum before he ever recorded with Kanye, Beyonce, or Linkin Park. Besides that Linkin Park mashup was a mash up of past solo Jay Z hit songs with theirs.
If you want to talk about wave riding, your point would've been more valid if you'd listed Jaz O, Big Daddy Kane, Puffy, and Irv. Those people actually had a hand in Jay Z becoming he was before the world knew Jay Z. Every artist you listed besides Biggie are artists Jay Z had a hand in blowing or helping sustain relevance.