There are A LOT of threads on to-do/project managers. Many of us have used and experimented with most of them. There is a lot to like about many of the apps and frustrations and limitations relative to our preferences, needs, and workflows.
After experimenting and using many of the apps, I’ve settled on the default Reminders app. The recent update made Reminders more capable than many realize. That said, though well designed, it is not the most feature rich. I’d argue that in terms of feature set it is a mid-level application, especially with the recent addition of tags and smart lists. Moreover, one can use GoodTask to enhance the underlying capabilities of Reminders.
I recently posted a thread on Reminders that you may find helpful:
I’m not advocating for your use of Reminders, merely that it is a worthy contender for many in the pantheon of to do apps. I believe that if one will take time to learn the many features of Reminders (too many of which are “hidden”) you may find that it meets your needs.