The best advice I have on removing big CC is just keep after them, keep using different baits and tactics. I've been after them for 3 years, and this year I finally feel like I'm on top of the situation.
Catmandoo is probably our champion large CC remover (Having eliminated his bag cats, he is contemplating a name change to "Gillmandoo"). Hey Ken - throw Jack a link to your CC control thread. IIRC it has all the best advice and suggestions in it.