Well if your looking for carbs and don't care about the sugar in oatmeal cookies, then eat some damn carbs. Why are you eating only oatmeal if you don't care about sugar. Why not eat every other splendidly wonderfull carb filled thing on the face of the earth. Of course, try to make it at least semi low fat because even though you don't care about fat levels, if you eat carbs and fat at the same time you will get fat and hinder muscle growth.
So, how about muffins, glorious bread with jelly, bagels, cereal,cereal,cereal, yogurt, rice, bread, oh wait did I mention bread, pasta, oh man pasta, and anything else else in the world.
And if you really don't care about fat then hit the damn dessert cart. Pies, cakes, ice cream, cookies, its all high in sugar and fat.
My suggestion to you would be to just eat stuff like oatmeal, rice, sweet potato, veggies, fruits, yogurt, etc. etc. but eat more of it.
So could you tell I'm on a low carb diet? Huh, could ya?