If we are talking subjectively, then it's simply because those are not among my favorite drummers. I respect Bonham and agree that he is very influential and talented, but there are other drummers in his era that I prefer over him. And I'm also not that much of a Zeppelin fan. About peart, I recognize him as a huge influence on many drummers that I adore (including Portnoy), but I really don't like Rush and therefore don't know him very well.
Here's a topic I rarely see discussed – favorite drummers. Drums are my favorite instrument...