Ah, let me see...
Ssethzentech: Already been mentioned a few times on here, but it's great.
Internethistorian: His documentary's are legendary. I still enjoy the gentleman pirate once every few months. The podcast is good as well.
Marsh: Already been mentioned on here a couple of times, but Marsh does some good content.
Yoro: This one is a smaller react/let's play channel, but I work a overnight job and he makes these amazing longform let's read visual novel videos where he actually bothers to read out the entire story. I mean, my Japanese is fine, but when I'm working, I just rather the person playing through the game to read everything. Good listening content.
Kraul: I listen to this just to catch the nuerosama ai conversations in a decent format. Normally it's great.
Ashens: Just the best. Classic old-school content with british humor about useless Chinese products and old computers. It's great. He's been around since the begging of time as well.
Retsupaure: Pretty much a dead gaming channel at this point. I remember in highschool watching these where they make fun of people's let's plays by roasting them in a reaction. Can seem a bit mean hearted, but honestly I thought it really was a useful practice back in the day. Now days, I think they just post the occasional lp or podcast on rare occasion.
I have a couple hundred more, but I think that's a good starting point.