Has anyone here considered cofagrigus? I saw alexhitman666 mention that he was looking for another reliable counter to kan, and actually cofagrigus is more reliable than Sableye at counter kan. Cof has mummy, which destroys parental bond, and a huge defensive stat of 145. Unfortunately, showdown is currently SLIGHTLY glitched on mummy v parental bond, as yesterday my cof switchin caused kan to still attack twice even after becoming infected with mummy.
When in, however, kan loses parental bond (he did so even on switch, I just don't know why it didn't solidly activate) and thus becomes a great deal less effective. Unless they predict the cof switch, they also generally don't hit cof on the switch (PuP/Return) and should they stay in, they get burned. HP fighting/rest/Willowisp/Skill swap is a good set (I run skill swap to take care of magic guard users as well) but a little customization can come into play with Cof's fairly decent support move pool. He also has a few moves that would otherwise be 'gimmicks' (aka skill swap) but really are beautiful when designing him to counter specific opponents.
Other than that, I've got nothing on the kan counter frontier. I used to try toxic stall chansey/skarm/slowbro to regen as he lost health, but if the kan went for PuP once or twice, I was in trouble.