My favourite streamer is Pepe (
www.twitch.tv/pepellou)
He is rather unknown, but a very friendly guy, he is humble, never brags, has fun with chess, sometimes you can see how he has just a normal life like you and I, he has a wife as far as I know and just you know is himself, also a strong chess player and I played against him once while on stream. To be more exact, I love Pepe. I can't tell you what it is. I feel like it's a good mixture of just chilling, good mood, social contact (he reacts to things you write in chat), funny talking, just silence and education.
Stay away from streamers that stream all the time or show their pets, their cleavage or other irrelevant stuff on stream or have clickbait titles like "I will destroy everyone" or talk loudly all the time - those people really are all in for the money and waste your time. It doesn't matter if they have a title or not - when they do stuff like this they waste your time. However, if you find the streamer that you like, consider to donate a couple of dollars to them, as it's a lot of work to stream, they make most of their money by donations (usually the equipment is very expensive too). I streamed myself for a couple months once and it is exhausting to talk so much non-stop!
Also always keep in mind that Twitch is mainly entertainment. For chess improvement, get a chess coach or find a small youtuber that isn't creating clickbait titles about openings, but honest and joyful about what he does. Maybe you like my content aswell. I decided to quit twitch for some reasons, one of which is that it is slowly turning into Onlyfans. So choose your content creator carefully, then it can be a relaxing way of falling asleep, like watching TV.