Not sure exactly how this was caused but I can detail what solutions I've tried:
- Creating a new profile with the same mods and world
- Restarting my computer
- Reinstalling minecraft, forge, java
Mods list: https://imgur.com/a/8pQ2aTA
Crash report: https://www.mediafire.com/file/d2z3n02nim8h7pm/latest.log/file
Edit: I can run new worlds completely fine in both of the custom profiles.