His deliberately misty Germanic ramblings have given too many Anglo-Saxons opportunity for irrelevant exegesis.
As for modern philosophers who have made an impact, though, I don't tend to agree. I mean, Being and Time was written only 80 years ago (in the grand scheme, that's very recent) and it's a work of tremendous importance and insight. Most recently, there is a lot of interesting stuff in philosophy of mind and science, ethical theory, and gender related/feminist philosophy. I did tend to see a lot of historians wearing their philosopher hat as they walk around the philosophy department, but at the same time, philosophy as we conceive it in the West is most definitely a Platonic dialogue. Philosophers build on their forefathers by responding to them in new and interesting ways. Of course, not everyone is smart or creative enough to respond to Heidegger in a really new and interesting way, but you can't fault the state of philosophy now with that.