I’m going to try this base this on how they are viewed historically by their sport first, style of play (this is tough however) and accomplishments. You can poke holes in each comparison because each athlete competed under different circumstances, eras, and teammates
Gretzky-Jordan- both widely considered the GOAT
Lemieux-Lebron- this will be controversial, however there is a lot of people who consider both these players top 2-3 all time. Both possess physical gifts never seen before, and peaked relatively close to Gretzky and Jordan but less team success. Obviously there are differences here (longevity) and not it’s completely parallel.
Howe- Kareem- saw this comparison earlier and love it. Long careers with highly underrated peaks
McDavid- Giannis- young MVPs with physical gifts. Sky’s the limit
Crosby-Kobe- They work harder than anyone they’re up against. They win, and both will go down as all-time greats, but not quite in the upper tier
Durant-Ovechkin- both might be the most gifted “scorers” we’ve ever seen. Comparison would have been even better if Durant stayed with OKC and grinded out a title ala Ovie. Durant s 2 titles don’t impress me at all
Vince Carter- Bure- High Flyers, highlight machines. All the talent in the world, could have accomplished more
Bobby Orr- Magic - played the game so much differently than those who came before. Both revered by sports historians as one of the best to ever do it. Both careers cut short.
Duncan-Lidstrom- I saw this earlier and loved the comparison. Again, there’s obvious differences, but I want to focus on the similarities. They both are near the top at their positions all time. Both had sustained success with their franchises with lots of accolades. Both had a calm demeanour and seemed unflappable.
Mike Bossy- Larry Bird- both had a stretch where they were the best in the game, and had great team success. Both underrated in the all time ranks.
Joe Thornton-Tracy McGrady- both had really high peaks where they were arguably the best in the game for a year or 2, but they just couldn’t get it done in the playoffs.
this is all I have for now- I can’t think of a proper comparison for Shaq or Wilt. Gretzky is kind of a blend with Wilt and Jordan