Like many have already said, there are a ton of threads on this topic so I’ll try not to repeat myself too much. My contender of choice is Trello, because I’ve always found a kanban concept best for visualizing how much I have to do. Trello also has nice tags, start/end dates, and rich media/attachment support.
Would echo the thoughts above re: finding a system and then matching an app to that system. I’d also encourage trying things that you might not have clicked with before, it took me a while to land on kanban but I loved it afterward. Even though I don’t use bullet journals anymore trialling one for a while taught me a lot about what I want out of a task manager.