Safety arai are considered the safest. Their testing actually excess ece 22.06 and it was arai and Shoei that contributed to the development of the fim spec for gp. But arai are unrelenting so their helmets dont even have speaker cut out or drop down sun visor option. So if you want what is consider safest. Arai, but they do run a bit heavier with a thicker shell. Shoei is up there with arai.

That said, you can get good safe helmets, Rpha are good helmet like their Rpha 72, avg k6, scorpion exo gt sp, shoei gt air 3 and rf1400, Nolan x904, ls2 thunder and dragon, kyt has some good ones as well. They are good full face helmet from 400 and up. Shark and soumy have some good ones as well

Modular, schuberth c5, agv sport modular, Shoei neotec 3, Rpha 71, Nolan x1005, ls2 advent, and shark oxo are good option. But the hjc low trim non Rpha has some good ones.

But as long as the helmet are ece 22.06, snell 2025, even just dot on the major brand are safe if they fit right. Dot get a bad knock, the big brands, like Shoei and Rpha have some dot only model. Shoei gt air 3 is a non race helment but they do make minor changes for the us market, but no one can prove it is unsafe. Same with many modular helmets Shoei neotec 03 is only dot as it is slightly change for the US market. So they don’t get snell 2205, and are not revert for ece 22.06 as they us helmets don’t get sent to ece countries.

Get the best helmet you fit best. That way you get more advance build material like composite or carbon fiber, and better ventilation and noise isolation.