The idea is to learn and model from the sites that are identified.
Here is one I can think of straight off the top of my head.
Blog Tips to Help You Make Money Blogging - ProBlogger
Darren has routinely shared his figures and I believe he earns well over six figures per year. It is not all from Affiliate marketing as he has his own products and also runs ads but I think it would be fair to say that a lot of it is.