sweetcrest Since you have organized your mods folder by creator this should be easy. You are going to have to do the 50/50 method. Because you absolutely have a broken mod or piece of cc that keeps giving you the endless screen. I would remove all of your mods to your main screen open your game and get a new mod folder. Don't save just exit. Then one creator at a time put back into your game. open your game and test it out. be sure (NOT TO SAVE YOUR GAME) OR YOU WILL LOSE EVERYTHING THAT YOU HAVE CREATED.
Keep adding the creators until you get the endless screen the last folder you placed will be the folder you need to check through for any broken item or mod. Remove it and check in game again. until all broken items are gone.