To remove all of the knox and mdm stuff you have to do this:
Open Samsung Calculator and type in (+30012012732+, this will pop up drp mode, then type in the *#0808#, select DM+Modem+ADB, and hit reboot. You should now have ADB! (you have to do this same method after every reboot)
Once you enable ADB, then you can run these commands to disable knox enrollment center:
"adb shell pm disable-user --user 0 com.sec.knox.kccagent"
"adb shell pm disable-user --user 0 com.planetcellinc.ressvc"
"adb shell pm disable-user --user 0 com.absolute.android.agent"
"adb shell pm disable-user --user 0 com.sec.enterprise.knox.cloudmdm.smdms"
From here you can also now grant SystemUItuner adb permissions to disable animations and modify your status bar/quick settings. FYI, none of this will survive a reset.
Now all I have left to do is figure out how to enable developer options so that I can OEM unlock. I successfully got CROM app to unlock it, I just have no way to access the toggle. After 7 days the prenormal KG Status did go away.
EDIT: I no longer have the phone so I cannot continue digging into this. It worked on all version of Oreo, I never got to try it on Pie.