The first answer is that I think the stereotype of LWers who aren't agentic is out of date (the article you linked is 13 years old). Much of the time when I meet LWers they're running or key figures in ambitious projects, organizing useful events, or doing interesting research.

The second answer is that the way I meet these people is through reaching out to see if our projects have synergy, or them reaching out to me, or a mutual friend introducing us. Also going to conferences or workshops or meetups and doing the same.

A few times I've gone to Rationality or EA meetups and I'm one of the people with the most agency there. Usually I don't go back to those meetups, and I imagine there's an evaporative cooling effect where other who do things also don't go.

So the second answer is that the way to connect with people who do things is to do things - then you have something to connect about.

Communities dedicated to a specific activity usually contain members that engage in that activity. Examples include:

• meditators
• hiking clubs
• pick-up artists
• weightlifters
• quantified self
• open source software contributors

Therefore, I think it's often a good idea to come to a conclusion of what one wants to do, and then seeking out people specifically to do that thing. I have found search engines useful to look for meetups.

Then again, in many of the do-things communities I've participated in the "all talk no action" problem is often well-known and frowned upon, see e.g. buffers and fuckarounditis.

“It must always be remembered that the Buddha way can provide relief from suffering only for those who actually practice.”

—Mahasi Sayadaw, Agga Maha Pandita

Doing things is a solitary activity. When you are doing things with others, other than direct socializing, the only time when you aren't just doing things by yourself but merely in the vicinity of others is when you are learning or there is a feedback loop of mentorship.

What I think you are actually seeking is for others to motivate you. The only person who can motivate you is yourself. When you feel like others are motivating you, what's actually happening is others are motivating you to motivate yourself. If you can't motivate yourself, you might end up dependent on others. You need to gain independence and abstain from external mental influences. Solitude is great for this.

You’re in Berkeley, last I was at the grouphouse Arcadia, it was filled with people getting ground-level contact with the world. My experience with Berkeley is you just need to get $\epsilon$ away from EAs/rationalists in order to find people doing a bunch of agentic stuff (though most EAs and rationalists I’ve met I think strike the right balamce between thought and agency, however I would suggest similarly if I noticed EAs and rationalists weren’t agentic and nothing else changed too much about the world as it currently exists).

Somewhat relatedly, you can typically find people doing stuff at hackathons or makerspaces.

The best I've found is to work in a somewhat dynamic business where your role is not perfectly defined.  Especially at small companies, or the parts of large companies that are relatively new and scrappy, you will be surrounded by people trying to model their part of the world well enough to improve it on a specific dimension.  And judged on your ability to do so.  

Do what? Can you clarify a bit what you mean?

I do things, such as aisafety.community, aisafety.info, aisafety.world, aisafety.training, ea.domains, alignment.dev and about a dozen others. Come hang out on Alignment Ecosystem Development.