DS didn't completely sleep through the night until somewhat recently. If he did, it meant up at 4am... which still probably isn't considered through the night...
FI suggested a bowl of cereal like 30 min before bed, and it worked pretty good. I find that I have to really pump him full of food right before bed and he'll sleep longer. Basically cluster feeding for the older baby.
Our schedule looks like this.. for some reference
5pm: supper time, usually 10-14 oz of food
6pm: 3-4 oz bottle
6:45ish: bowl of cereal
7:30: 5-6 oz bottle.(the past few nights it's been more like 8!!!)
I've also been working on letting him fuss it out for a few months. I say fuss rather than cry, because with him it was clearly a whimper, and more like "mama, I'm lonely and could use snuggles with a warm bottle..." rather than famished and actually needing food. Plus, i could tell it wasn't about the food, becasue he'd fall back asleep after eating an ounce or so.
Every baby is different, (and every mama).. but I'm hoping you get your full nights sleep soon! GL.