You're right, there are lots of EA community builders, just they might not be specifically focused on wealthy people. Sorry about that! I edited my post if it helps.

Also, thanks for all the links! Inferential Distance is an idea I've considered before but couldn't put into words until now—one of the main ones being that someone has to expand their moral circle before any conversation about altruism can be had.

And now that you mention it, creating cool spaces for people to join EA feels to me possibly more effective than convincing specific wealthy individuals (multiplier effect again?).

I'll stop asking questions here because you've explained lots of great stuff, and I don't want to wear you out :) 

(I'm sure there's lots of other stuff you're involved with, being a community builder!)

But if you get any more ideas spur of the moment, feel free to DM me!

That's an amazing answer, thank you! And thanks for mentioning Rethink Priorities and EA funds, I've taken a look and (even though they don't seem to generally focus on wealthy individuals) they're quite interesting. Do you know why it tends to be difficult to convince people? And would I be able to contact any of these 3 people you know? No worries if not!