The Wise Mothman gives each player a Rad Counter whenever it enters the battlefield or attacks
Loxi: I really love the design of this because it shores up the one criticism I would have had for enchantment creature decks: "Are there enough good enchantment creatures alone to build around?" While that answer might be yes, this gives you such a great toolbox and fixes the enchantress issue of being a value engine without a win condition
Rather than capping the effect, like Rapunzel did at three damage, Ohana Means Family instead removes all damage from one of your characters and lets you draw a card for each point healed in the process
Vraska, Betrayal's Sting is a very nice top-end planeswalker if youre interested in the poison route
Such a perfect fit with removal, edicts, and any combat your opponents engage in
Im not going to parse out the best or worst ones here, but they all kind of fit the description