Here's some of my own, in no particular order:
Gotham Chess - also known for his catchphrase: "Sacrifices... THE ROOK!!!". Yeah, that guy.
Kyle Hill is a science communicator and makes awesome educational content; he also debunks conspiracy theories.
Jeff Geerling is a RasPi aficionado who's made tons of projects.
Louis Rossmann specializes in consumer tech (mostly computers); he's a great critic of corporations and DRM.
Jenna Moreci is a published fantasy writer and has great videos on what to do and not to do when writing fiction.
One Topic at a Time - shares LGBTQ memes found on reddit. His voice may sound annoying. (What can I say? It's an acquired taste)
Bits inside by René Rebe specializes in Linux and Open Source stuff.
Noralities is a girl who makes video essays about anime, and they're not trivial opinions They involve writing, stereotypes, romance, society, and stuff. She's done her homework.
EDIT: Added details.