EDIT: I turned the server offline that was running this.
Tldr: Go here to find module/header info: http://classifier.celdevs.com
Because I was tired of scrolling to the bottom of the API pages of Unreal Engine to copy the module or header path I created a tool that does it for me.
All you need to do is type in a class name AActor, UWorld, FCoreDelegates, TArray and click “Gimme dat!” and it’ll provide you with the proper module/header.
If you wanna see a video of it working you can see that here: https://twitter.com/CatherineCel/status/1136344909244436480
To actually use the tool go here: http://classifier.celdevs.com