Karnage - Lust

Lucilia - Pride

Annabeth - Frankly I'm not sure. Envy perhaps? Lust? A sort of understated Pride? I'll let someone else figure this out.

Also if I may elaborate: Sloth isn't just laziness. It's more along the lines of Apathy, Despair; Like the cynic who doesn't lift a finger to help others because he see's it as "Pointless", and let's whatever happens happen. Being lazy is just one way it's shown, but the point is a purposeful inactivity when something could be done. Additionally, I always felt that Greed wasn't so much "Wanting more" but "Not giving", since Gluttony typically fulfills the requirements of wanting in excess. Whereas a Gluttonous person would eat all the food at a banquet even if he ends up vomiting it all out an hour later, a Greedy person wouldn't even let anyone else eat, even if the food goes to waste.