You can find extensive lists like WatchMojo's Top 10 Anime Moments, which covers everything from legendary fights to emotional character arcs.
Whether you're looking to watch iconic moments or want to create your own, YouTube has a wealth of resources for anime scenes. Anime scenes - YouTube
Many creators rank scenes by genre or "hype" factor, such as Top 30 Best Anime Moments of the Century or lists focusing on badass moments. Creating and Editing Anime Scenes You can find extensive lists like WatchMojo's Top