Running engagement surveys through M365 without buying another tool?

HR asked me if we can run quarterly employee engagement surveys using our existing M365 stack. We have E3 licenses. I tried setting up something with Forms but the analytics are super basic and theres no way to track trends over time or slice by department without a bunch of manual Excel work. Before I go back to HR and tell them we need to buy a dedicated survey tool, has anyone gotten something workable going with just M365?