i’ve used 2.1 and 2.25 NN & RR non tubeless and have got them all to work with a track pump on 3 sets of wheels, they work well tubeless, sometimes i have a bit of a mare sometimes they work first time.
I also got some ust NN RR and they really are easy to inflate.
if you want reliability go ust if you want to race go non ust.
i wouldnt mind trying some rocket rons, vredstein blank panther and race king 2.2
i thought i’d add that if you ride RR on road they wear fast, but that could be said for most mtb tyres i guess.
Bontrager tubeless ready tyres are good, like mudx, acx, not sure what they have to offer in faster tyres, but could be worth a look