McDavid oiSH% this year 10.6%, career = 10.6%
Kucherov oiSH% this year 11.9%, career 10.3%
Rantanen oiSH% this year 13.2%, career 9.9% (last year he broke out with 84 points and was 10.5%)
MacKinnon oiSH% this year 12.8%, career 9.9% (last year was 11.9%)
Of these 4, McDavid is the most likely to continue current production. Kucherov the 2nd most and Rantanen the least likely.
This is of course about EV production but since more of the production comes from EV, we can use this to loosely predict ROS production.