Just made an Oatmeal Stout with the Wyeast West Yorkshire strain-1469 and I absolutely love it. Not sure if White Labs has a comparable strain. I have used WLP005 in an Oatmeal Stout and didn't care for it too much. Also I would think London Ale 013, may be a bit dry and attenuative for an oatmeal stout for me. English Ale 002 would work well, and as an off the wall suggestion, try WLP 028, the edinburgh ale yeast. Its clean, but doesn't attenuate too much that it would dry things out.