Millions or even billions if you accept that many, many attitudes and thoughts attributed to stoicism are taught in the Bible, both testaments.

In fact, the opening of the book of John was partially an appeal to the stoics to see that their philosophy is complete in the Christ.

And for what it's worth, Paul dialogued with the stoics in Athens in Acts 17, saying some of what I'm saying here... that stoicism part of a picture completed by the teachings of Christ.

DOZENS!!

There are DOZENS of us.

Hundreds of thousands, absolute minimum. You want to look at the small scale environmentalists as one specific example. Not the "fly my lear jet to the anti-nuclear protest" but the organic home gardener types. Chipsy sounds like he was channeling John Micheal Greer there, towards the end. JMG's blog is well worth reading for other insights, of course.