Kimi set 10 fastest laps in the 2008 Ferrari. He was very quick that year then he wasn't crashing in Sutil, having Hamilton take him out, or the Ferrari failing with broken exhausts and the like.
Vettel doesn't even make the list for fastest laps in a single season. Webber is joint 8th with 7 fastest laps in a season (2011). Probably because out front on his own he doesn't always have to push 100%.
Schumacher's record seasons for fastest laps were all when he had competition for the title 94, 95, 2004