Maxxis EXO stuff. Doesn’t matter about being UST, or even tubeless ready, as most are tubeless ready anyway, just not all are certified as such.
I run Minion EXO 2.5 front and HR2 EXO 2.4 rear on the full sus. Loads of grip and knobbles aren’t disintegrating and no sidewall tears.
That said, they’re single ply and one did get a hole in the top, but was a sharp git of a thing in the Alps that just punched right through and not sure even dual ply would protect it. Patched up though and been riding it for a year and it returned to the Alps on more sharp flinty stuff with no problems.
HR2 is probably not rollable enough, it’s a grippy tyre. I use an Ardent on my hard tail which has a bit more xc duties, though I’m not sure I’ll stick with it. Rolls, but a lot less grip. Regular HR maybe. I’ve also got a Larsen TT spare that I inherited that I might give a go. Bit of a dry weather tyre though I think, hardpack or loose over hardpack I understand.