I have to go with this series again. It just has it all.
Gluttony - oh yes, they enjoy eating in this book. Lots of wine, and all sorts of foods.
Fornication - there is sex. Not as much as in the movie version, but there is definitely some.
Greed - everyone wants something. Mostly money and power.
Pride - I can't think of one character who isn't proud. Maybe the monk. I think.
Despair - I think the one despairing mostly is me, because I just have no idea how anyone is going to survive the winter. Sam does despair a lot as well.
Wrath - Cersei comes to mind. Now that woman has a lot of anger, and she doesn't let it get pent up.
Vanity - plenty of that going around as well.
Sloth - perhaps this is the sin that is in the book the least. Everyone is very busy. Perhaps the only lazy person is the little king, but he's just a kid.