The most impressive of current creators are probably Bendis and PAD (especially PAD). I mean, what, Bendis has done USM and Powers for 40-50 issues now, and PAD did Young Justice and Supergirl until they were cancelled. (55 and 80, respectively).
And how long was David on Hulk? 9, 10 years? Amazing.
But yeah, it's crazy how some people don't even stay on books long at all. How many issues did Quietely do on New X-Men? Peh!