I love rice, but I would caution against eating it too soon after oral surgery. The rice grains can get stuck in very bad places and you may not be able to get them out. Hello infection.
Jello and pudding are also good foods to eat after surgery. They are cold, go down easy and do have some protein in them. They don't require chewing. If a jello cup is too solid, you can stir it with a fork to break it up and then eat it.
Refried beans are also an excellent choice for maybe three or four days post surgery, and you can puree them further if they're too chunky. They're soft, and not usually very spicy, although they do have flavor. Plus, they are packed with protein. Low fat versions are available, too, and they are in every grocery store.