Depends on the genre you prefer, but I'll try to cover a lot of bases for anyone who might be interested. I'll break it up into 2 comments cause it's not letting me post so I might have hit the character limit lol.
Part 1
If you like let's plays, I think Letsgameitout is one of the most consistently entertaining channels. His videos are a good length, not so long that they drag out, but not so short that they feel like they're done too soon, and he uploads frequently enough to not feel like it takes ages for a new video to come out, but not so frequently that it feels like he sacrifices quality.
If you like games but not the format of most let's plays, or just like general humour and don't mind most videos being game related, then DougDoug is hilarious. He streams on twitch but edits the streams down for YouTube. Seeing him interact with his twitch chat is really entertaining, and his shenanigans involving AI are also great as well. A good entry video for his content is probably the pajama Sam video he made recently where he tries to get chatgpt to beat pajama Sam, and the ai gets more and more unhinged as the video goes on. But it is one of his longer videos so you can also try any of his other videos. Another good one would be the one where he gets two halves of his twitch chat to compete against each other in GTAV using chat controls a la twitch plays pokemon. There's also GameChamp3000, who does a lot of gaming challenges, but she doesn't upload as often sadly. But her videos are very high quality and the lengths she goes to in order to get around a road block can be pretty crazy.
If you like diy or humorous educational stuff, then electroboom is a very entertaining channel and also very informative when it comes to electricity and engineering. He's the guy who made the diy electric guitar. Basically he's an electrician who does projects where he tries to make something from scratch, and along the way he shows all the wrong ways you can do something by doing them himself and then getting hurt by it slapstick style. He's shown how he fakes a lot of the stunts to assure his audience that he's not putting himself in danger (though he has also confessed to some real near misses like the Jacob's ladder incident), but he's good at making it look really convincing which somehow adds to the humour. He's also good at telling jokes on top of the slapstick. Similar channels like his include William Osman, Michael Reeves, and I did a thing. But of the 4 of them Electroboom and I did a Thing upload the most consistently I think, though shout out to Michael Reeves for being the most insane of the 4 lol.
If you like just regular educational channels, then I've heard veritasium is good, and there's also Mark Rober though he's not just education, he also does some fun experiments and even dabble in dealing with scammers. There might be some controversy from when he made a video about autism because I heard he was promoting an autism advocacy group that was possibly tied to autism speaks (which is largely hated by the autistic community), but I'm not super informed on that and idk if he addressed it. His video about it was positive towards autistic people since his son is autistic though, so if that's a sticking point for you then you can always look into it and draw your own conclusions. It's not usually a topic of his videos though so if it's not a deal breaker then you can just watch any of his other videos and ignore that one.
If you like drama and video essays then TRO aka The Right Opinion is probably one of my favourite channels for that type of content, because he's really good at portraying every side fairly without coming across as obnoxiously neutral. He's also good at covering topics in a way that feels thorough without dragging on for too long.