@feklar42
Yes there are guilds in eso that do storymode dungeon runs. Scriven is one of them (PC/NA)
There's also ESO Slow Dungeons discord group but we don't have regular events. I try to encourage members to form dungeon groups but very few people do so. Most expect someone else to organize dungeon groups
Blackfeather Academy does story mode runs weekly and training trials every Tuesday. We run multiple groups through story mode and even do a live stream when it's on so people can watch without feeling pressure to play (or just want to spectate and see if the dungeon is something they are interested in). We are running Maw of Lorkhaj tonight as a training trial and did a story mode of March of Sacrifices on Sunday night.
If you'd like an invite message me in game, my handle is the same there as it is here.
"I drain the blood of our enemies and fire it into you. It's a lot less messy than it sounds, and yeah I'm basically a Vampire without the whole AGH FIRE BAD"