Zack Fair is worse than Dauntless Bodyguard and Selfless Savior in a vacuum if your list doesn't care about Legends, but the ability to transfer equipment makes it a decent support for future Hammer Time decks, though it will likely compete for slots with Skrelv, Defector Mite
This results in infinite landfall triggers, which of course also results in infinite Ally tokens
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For starters, there's a whole lot of potential in the card itself, even if you want to just opt for the equally as beautiful, if a little less expensive, Legendary variant (which is valued at just under $6 right now)
A great way is turning the worst-case into the best case, by way of Electro, Assaulting Battery or Birgi, God of Storytelling Horn of Bounty
While I couldn't resist bringing an aggro group hug deck to the table, as I opened the article saying, there's innumerable ways you can go with Ms