The leader and classic game-winner here is Simic Sky Swallower, but recent iterations like Sphinx of the Final Word or Iridescent Angel are certainly in the conversation, nest pas
Then, you draw a card for each counter on it when it enters the battlefield, all but guaranteeing you get to refill your hand or even draw extra cards if you can load it up with enough counters
Some control decks may play a copy of Mystic Sanctuary so thats something to always consider alongside Uro or the odd Snapcaster Although we dont see these decks too often these days, for historic reference: Reanimator: Reanimation targets, Faithless Looting Hogaak: Bridge from Below, Hogaak, Arisen Necropolis, Vengevine, Bloodghast, Gravecrawler, Cabal Therapy Madness: Vengevine, Faithless Looting, Anger NicFit: Cabal Therapy however, really no specific card other than Academy Rector in NixFit builds
Wait, it has two spells on it