Okay, here's my issue:
I'm at the point of the quest "The Fallen" where I have to speak to the Jarl of Whiterun (Jarl Balgruuf in my case), so I can trap the dragon. However, once the task to speak to him is initiated, the first of my problems comes up: the quest marker leading to Jarl Balgruuf does not show up. It's as if the quest will not even detect him as an NPC. At first, I figured that was just some minor bug, so I shrugged it off and decided to fast travel to Dragonsreach to speak to him anyways. That's when the second problem happened. Whenever I pressed "E" to talk to him, it would not show a dialogue box about the quest or anything. All that happened when I pressed it was simply saying "Yes?", "Watch the skies", or other basic NPC stuff. Because of that, I am unable to progress any further in the quest. I've tried restarting the game, and creating new characters to start a speed test playthrough, but the same exact problem persists. I've played through the main quest several times already and this NEVER happened. I own Special Edition, and yes, I do have a slightly heavily modded game. About 180 active mods, but very little change NPC's. I believe maybe one of my mods may be the problem so if I have to give my list away please tell me to do so.
Disclaimer: Please do not give me the "easy way out" of uninstalling/reinstalling the game. I've had major issues with the game on the past, and I never had to do such a thing.
What should I do?