User blog comment:Legionaire22/AT Chaos Vote/@comment-1932673-20111022082911/@comment-25033299-20111023173325

El'Jonson is still my pick. And it wouldn't be that much of a stretch to keep the primarchs pure. There's only 17 left. Given that there has never been a Grey Knight who has fallen to Chaos, with around 3000 of them at any given time for the past 10000 years, it's completely possible.