Your light use day is extremely heavy for me. Hell, with that kind of use my s7 edge would be at 25% and my s6 would be dead by noon lol. My thoughts were a Rouge app too, that's why I posted screenshots of Gsam but I'm not seeing anything are you? It looks like android kernel and system are the culprits to me. I have already cleared the cache in recovery and got no change. What is the difference between the cache in Settings?
It can be hard to find apps that are draining the battery, especially with an un-rooted phone. My Nexus 6P was rooted so I was able to employ more tools to figure out which apps were messing up the battery life, but even then it was not always straight forward. Weather Bug and MyRadar were two that always seemed to be an issue. i-exit was at times, too, at least on the 6P.
So no easy answer to this one. I've seen some suggest doing a factory reset and only loading a few apps at a time to try to pinpoint the problem child. I think I'd start deleting apps a few at a time, dumping cache and rebooting to see if I could figure it out that way before doing a reset, personally.
I'm not sure what the difference is between the Cache under Settings->Storage and in the recovery menu. But I clear them both on a regular basis, more so the one under Settings, since I don't have to boot the phone to do it. My wife's Note 3 had over 10gb in that cache at one point, eating up her internal storage, heavily impacting her battery life and way slowing down the phone. Since I cleaned that up, it's like a new phone. So it's become something I just do now.