There is a reason why you did not include Lemieux-Jagr even too I am not sure Gretzky did leave much doubt when they were playing in the same league at the same time, because making the argument that 54goals-123 pts Jagr has a 33 years old in 2005-2006 could not compete for the Art Ross today at his peak would be really hard to make, the OV-Crosby he kept with still doing quite well has older shadow of their peak self now.
The idea that Gretzky was just having an high IQ and not one of the most skilled physically gifted athlete of all time (vo2max, reaction time, periphical vision), yes he apparently had the Longest loop reflexes (movement responses to sensory stimuli that involve complex loops of nerve cells in the brain) ever measured by one doctor measuring that apparently:
I was reading the book "Of Ice And Men" and came across the mention of a study done on long-loop neuron reflexes (motor responses to sensory stimuli) done by Dr. William Tatton at the University of British Columbia. It noted that of all the people Dr. Tatton tested, Wayne Gretzky had the...
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He was also quite the skater, maybe the best slapshot in the history of the league, etc... Jean Perron had the chance to be an assistant coach on a Gretzky team in some international tourney context and he was in charge of the training days, he said he never saw anyone be as good at puck trick, playing with it-pure skilled display than Gretzky during off time, it was just more efficient to play like he did in real game time.