Not sure if you mean "individuals" compared to companies or organizations, or actually just solo bloggers, so I'll include a few that have more than one individual author but are "personal".

https://marginalrevolution.com/ - on economics but so much else

https://avc.com/ - Fred has some of the best startup insights

https://abovethecrowd.com/ - Gurley doesn't blog much but when he does it's great