Going off of the mentioned idea of learning top tiers or high tiers, there are three main characters that can transfer the most fundamental and optimal styles to Zelda: Marth, Jigglypuff, and Sheik. Marth is a spacing character with his semi-fast aerials (if you spam it you will get punished through baiting), and his tipper mechanic can help you with the emphasis on sweetspotting your main aerials. He embodies patient, strategic, precise playstyles, so he is not really an aggro character by nature. Jigglypuff is similar. She may have the best aerial mobility, but she still emphasizes spacing and patience. Once you find an opening with Jigglypuff, you can punish the player to the fullest extent, which is something that all players should learn IMO. Besides, you like Puff it seems, so it would be beneficial. Sheik, your alter ego, is a defensive, fundamentals character who loves the grab. Learning how to play her will teach you how important it is to create an opening and follow up the attacks and throws without over extending. The other top tiers and high tiers can teach you more, but those are the main ones that can help your Zelda develop. Fox and Falco might be the least applicable for Zelda since they are aggressive characters that control the stage with projectiles and approaches, which Zelda doesn't do that often. The best to learn from those two is to become fast and precise with inputs, and once you do that with Fox it will feel much easier to play Zelda, but don't kill your hands like Hax did. Peach can help with the idea of carrying out punishes with slower tech chases than most of the high tiers, since both women have a similar speed. Ice Climbers emphasize grabs and their followups. Captain Falcon will somewhat feel like a nerfed Fox with mostly unsafe approaches (his aggression) and no projectile to take advantage of, but he will emphasize tech chasing. That is what I can tell you with the application of high and top tiers into your Zelda gameplay. The rest depends on how you develop your playstyle of Zelda.