I can only speak from experience
I am capable of eating 3 cups uncooked rice and only stopping because it hurts, most of my meals till recently were balanced around quantity because that was the only way to stop me from being hungry. I did eat meat, but also in a relatively large quantity when I had it too.
so in trying different things I read protein/high protein diets help with weight loss, and i'm not talking about atkins or anything, its a reported side effect of protein shakes where it curbs hunger. for me, I could easily eat 2000 calories (and I have) and still been thinking of food and what I could eat. then I got some protein powder to see how it would effect me (its the cheapest way to get protein on its own, if I wasn't going for a calorie deficit, there are other methods/ways/foods) and some rice (I think at this point 1/2 a cup medium grain) and a shake later, i'm not thinking of food, and i'm not thinking of food for upwards 4 hours, and only getting genuinely hungry after 6-7. so with that knowledge, 'midnight snacks' became a mouthful of snack (generally the 1 serving/28 gram range, I measured it out of curiosity once) and a shake, this for me is about 300~ calories depending on snack food and shake, down from near full meal or half a bag of snack food (8-16 servings depending on bag size)
since then I have tried to keep a fairly high protein diet, or at least a 'high' protein meal in circulation.
right now its
1/2 cup jasmine rice with 3/4 cup water
italian seasoning 1tspn
salt 1/2 tspn
small bit of virgin olive oil (2-5 grams, I measured it)
100g slow cooked shredded chicken breast
and when I have some laying around, various vegetables, but just the above is a meal on its own and I think it comes in 500~ or so and is good for 4-6 hours
what gets annoying is the diets that tell people carbs are bad, they aren't, they just do very little for you especially if you are not active, or that fat is bad, which again, its not, its just not something you should eat in large quantities because it's calorically dense, if anything sugar is the bad one because it creates a craving and unless we eat enough to get sick, our body never really has an off switch for it, but even then understanding it is the key point. really wish schools taught up this instead of the useless crap they ended up teaching, good chance I wouldn't be needing to lose weight now.