So I'm playing a Bosmer who's secretly a Thalmor agent. I'm friends with many people in Certain towns and stomping out Talos worship. Any notable Worshippers? I got the guy in whiterun.

a thalmor that actually does what they do well, cool ill give that a try, also maybe check if people have talos amulets in there inventory and kill them.

In Whiterun you could also look into the Grey-manes.

If I slaughter all Talos supporters, I'll have a massacre. I'm looking for the leaders who are most vocal to assassinate them to kill morale.

The priestesses in Windhelm and Riften- I don't imagine they are essential. There's also a priest in Windhelm.

Stormcloaks, obviously.

Ondolemar in Markarth has a quest to arrest one- Ogmund, the skald poet.

Just walk around listening for "by the Nine."

If you want the most notable I would start with the priests of Talos in Riften, Whiterun and Windhelm. There is a quest in Markarth that would serve you as well, as it arrests a prominent person.

The head of the grey-mane family in whiterun would be another good candidate.

Then you have the the Silverbloods in Markarth, but only one of them is non essential and that is I believe only after a certain quest.

Most Nords in windhelm are Talos worshippers.

I'll be waiting for you then. Btw I already have my crossbow upgraded.

If you talk to the priestess in Windhelm she'll even tell you who are devoted. Ulfric is obviously essential, but I don't know about the rest.
Then there's the Snow-Shod family in Riften, the mother of the family is a priestess of Talos.

Found some others for you. Madena the court mage in Dawnstar. Non essential supports a pro Talos Jarl and fought against the dominion in the great war.

Then in Falkreath you have the former Jarl who is pro Stormcloack, now that guy is essential but two other people in is house are not. You could use them to send a message. You also have Bolund in that city, he's a pro stormcloack Nord that really hates outsiders. His brother, Solaf, is the shopkeeper and a former Stormcloack soldier so he might be a good target.

I believe you can also kill the son of the Jarl in Riften, the one that supports the stormclocks. That's a rather big message.

Can't think of many others right now.

Im surprised no-one has mentioned the preacher in Whiterun yet.
..Oh wait, the OP did. :facedesk:

Thats it, Im too tired.