So the largest is usually around 24 cubic in a counter depth. Take a look at my blog and the Bosch 800 series, although rated at 21 cubic to me, has the smartest shelving layout, dual compressors, and a super reliable unit. Probably my favorite counter depth on the market today! If I were to say I love a fridge right now, this would be it. The unit has internal water as well. It’s got the looks and the quality. Bosch B36CT80SNS
Your alcove should be 72” high, as that has been the standard in kitchen design for decades. Take a look at your cabinet above for a detachable filler that can be removed, as that was often done to be able to close it in a bit more for a shorter model.