Will these work on pureed or have to wait for a later stage and if so which one?  I think I may use peanut butter though.

 a couple of things, 1. the yogurt has milk in it, post op most people are lactose intolerant.. BAD thing to eat and the symptoms you are having sound exactly like reactions to the milk product

2. you also sound like you might have a stricture... have you had them do an endoscopy? i also had all those things post op and was loosing 16+ lbs a week right off, couldnt eat, pain, vomiting nausea etc, they fixed that and poof the next day (literally) i was better, even if they dont think its that it might help to have them take a look and see whats going on

3. your tastes change big time post op, so i would put a lot of the taste change on that... 

as for sugars even like splenda making you dumb thats normal, i have other post-op friends who dump from things as simple as the sugar in baked beans, or crystal light... its very hard BUT that and the lactose intolerance can get better after a year or so (not always but often), i was lactose intolerant for about 5 months... 

your stamina is shot becuase of surgery and because your body is going through hell withOUT all the complications... so the complications make it worse... i would suggest staying away from ANY dairy (cottage cheese, eggs, milk, cheese, yogurt etc) you can make jello and puddings from mixes and put the powdered sugar IN the mix... that works really well (did that a lot post op), make sure its sugar free mixes of course... and at this point if those are part of the problem it will take some time for the body to heal its self so patience... i also had to do the prevacid (you should be taking the ones that dissolve on your tounge), carafate (nasty chalky crap) etc... it was 100% stricture... 

good luck

Yeah, I'm sorry about all your complications.  Hopefully you can keep it down.

I got the ingredients this evening and my oldest is going to help me make them in the morning and be my official taste tester. He is pretty picky so I figure if he likes them then I will too and it is just a matter of holding them down.

In the beginning my favorite was Taziki Sauce made with greek yogurt. I could just eat it with a spoon I love it so much but gives me indigestion now. Osiokos plain greek yogurt (it is the one I find that has the most protein and least sugar), cucumber peeled, seeded and finely chopped (or grated), parsley and dill (fresh) can use both or just one of the two, one garlic clove grated, a little sea salt and pepper. You can put it all into a blender to get it to a more creamy consistency but I always just preferred the little bites of cucumber I would get. Later on you can try it with low-carb flat bread, tortilla's, or pita chips tosted in the oven. I probably lived off cream of wheat the first week. I got dixie cups to control my portion sizes in the beginning as well.