How to tackle the Annual cycle?

Question

We are experimenting with Annual cycle in our company for some workloads we have to repeat every week, month, year etc...

So far we have tried:

• Teams calender

• Microsoft Planner

• Classic SharePoint Online Task list with Gantt (modern doesnt support Gantt)

• Custom list in SharePoint Online (with some SPD and or Flow attached for the logic)

Anybody have any better suggestions we can try out inside the Microsoft umbrella? Only 2 stipulations

1. It has to be OOTB functionality so no extra coding of any kind

2. No 3rd party software