While Google News lets you block certain sources it does not allow you to block certain keywords (I’m looking at you famous-for-being-famous-family of vapid, over-exposed, insipid photo opportunists). There are certain Chrome extensions that let you block keywords, but I prefer using Safari on my Mac — overall it runs smoother, and uses less system resources.
So, using the AdblockPlus extension, I created my own extensions using keywords that I think are relevant, and it has completely cleaned up my newsfeed of these evil, soul-draining vermin.