Are there any good examples of copyright hypocrites? That is, companies which have spent great effort pursuing copyright infringement while infringing on copyright themselves.

I don't consider Google to be largely this sort of company, as they've fought to expand access (when it's in their interest, at least). Companies like Disney come to mind, but they're not exactly the same. They often adapt works where the copyright has expired, while lobbying to prevent their own works from having their copyright expire. That is definitely unfair, but not quite the same.