Hello again! I just thought I’d update you all on my progress. What I ended up doing was working solely with the Environment Light Rig and a Post-Process Volume and I am now getting some pretty consistent results.
Unfortunately, my rig was performing like a potato on such high settings, so I clicked Auto in the Engine Scalability Settings to let it decide what would work best and did my best to mimic those settings in game.
Here are some screenshots showing a few different times in the day/night sequence and some indoor lighting shots, both in game and in the editor.
I also want to thank everyone for their input. I appreciate all your help.