They already have one. His name is Tyler Bozak. He's 15/37 for his career (40.5%), although 1/7 last year, and no attempts this year. Crosby has a NHL career mark of 47.2%, McJesus is 0% (2 attempts - they figured out he sucks early on), Ovechkin 38%, Patrick Kane 36.6%.
Honestly, the Leafs have no shortage of players who can score in the shootout. I would take my chances with Bozak, JVR (8/22 career 36.4%), Marner, Matthews, Nylander, etc. What I'm curious about is whether the Leafs, over the time the shootout has been a thing, are really that much worse than everyone else. Unfortunately, I don't have a clue how to put that together.