If you look at which philosophers have made the most impact by publishing in refereed philosophy journals over the last 10 years, it is easy to conclude that the one with the most impact, across academia, is Joshua Knobe. He not only has some very highly cited articles, he has a lot of articles that are cited many times. Indeed, his Web of Knowledge h-score for the last decade is, I believe, 11, which is nearly as good as some journals.
The only place Knobe’s impact doesn’t show up is in the Top 4 philosophy journals. He’s been cited 5 times in Journal of Philosophy, twice in Philosophical Review (both in the last year), 4 times in Nous (twice in his own articles), and never in Mind.
That’s not because he is only getting cited outside philosophy. He has 20 citations in Philosophical Studies, 19 in Mind & Language, 9 in Analysis, 8 in PPR, and so on. It is something very distinctive about those four journals that means work like Knobe’s isn’t getting cited there.