Ciro Santilli is an interesting corner case in the pantheon of high-conscientious, mostly online(?) individuals. Other notable figures here being Alexey Guzey, Gwern, etc.
It would be neat to find a site with a listing of notable bloggers in niche domains.
Google is good for this! My go-to example is the set of inbound links (think Project Xanadu) to Simon DeDeo's Santa Fe page: 'intext:tuvalu.santafe.edu/~simon -site:tuvalu.santafe.edu'. This works because interesting people cite interesting people, so it's pretty easy to continuously expand outwards from a single node.
Ah, I hadn't ever thought of searching for inbound links using intext. This is a great suggestion. Thank you!