The OP comes down to either placing McDavid above Mario and/or Orr all-time based on elite longevity and/or placing his offensive peak at a ceiling clearly above Howe's.
Does anyone want to place his peak along side Mario and/or Orr? If not, then the answer is likely not.
It hard to place him with Mario given the somewhat direct line you can draw from McDavid through Crosby and Jagr to Mario.
I don’t believe that’s true. Howe’s peak was 4 seasons. I think his peak could still be considered better, but if McDavid maintains a longer peak and higher average level through say his best 10 years, and also has a healthy, strong finish into his late 30s, a better “prime” and strong longevity could put him ahead.