The current leader is just terrible. His jokes have been tediously shrill for years and years. This is the closest he's come to being part of an entertaining video: https://www.youtube.com/watch?v=FFbVKL-Meo0
Well, maybe this one if you can tolerate cartoons: https://www.youtube.com/watch?v=7Zrn-yCRmls
If you want to make this about ethics or something, this is a guy who was paid for reviews: https://www.theverge.com/2016/7/12/12157310/pewdiepie-youtubers-sponsored-videos-ftc-warner-bros
T-Series I don't know. It doesn't have a public face that I'm familiar with and I don't care. I can actually watch or listen to a T-Series video. Some of their movies, like one called Simmba, look so nutty and over the top that it's kind of funny. And hey, they made their name off of creating content instead of leeching off trends.
So there. https://www.youtube.com/user/tseries
