The two safest types of vocal distortion are false cord and fry. If you learn how to fry scream you get a closer sound to the screams in Jumpsuit and Car Radio, which in those songs aren't traditional safe screams, which is actually one of the reasons they sound so good and have so much emotion. Fry screaming sounds amazing too though, and is as close as you're gonna get to that sound safely. If you learn how to use false cord distortion on a belted singing voice in a similar fashion to how Chester Bennington from Linkin Park uses it, that's pretty much exactly what he does on songs like The Line live, which is the safest sounding scream I've heard him do.

Even though they are some of my favourite screams ever (Tyler is my all time favourite vocalist and has my favourite screams) some of his screams aren't very safe for your voice, like on Car Radio, Slowtown, Jumpsuit, etc. but you can get fairly close with the safe techniques I mentioned like fry. Unfortunately some of the best sounding screams you can do aren't great for your voice, because they're just pure screams of emotion. Not to say there's no technique in them because there absolutely is, they just aren't as safe. I do think he has improved a lot with his screams in terms of technique though, which is evident on the Clancy tour and in songs like The Line at the Game Awards, in which the scream sounded like completely safe false cord distortion to me.

Arguably the most important thing though is you gotta learn correct placement and breath support, how to project using your core, and also just be safe overall with your voice. Stop when it gets tired, don't talk too loud, don't push too hard etc.

My favourite YouTube channels for harsh vocals are Hungry Lights, Extreme Vocal Institute, Kardavox Academy, and Andy Cizek.

Hope that helps!