Switch to another app's active window only
There seem to be two proprietary programs that do solve this problem, but there isn't a way to set it up yourself using a keyboard shortcut.

The two apps are Witch (as suggested by Buscar웃) and Contexts, in case someone wanted to check them both out. Witch costs $14, and Contexts costs $9.

I'm trying both to see which one fits my needs most as both offer a free trial.

http://manytricks.com/witch/

https://contexts.co