Hiking trails advice in southern Norway

I enjoy hiking and being in nature, so I've already ruled out Trolltunga, Kjerag, and Preikestolen because they're overcrowded. I don't want to wait in line on a hiking trail; it doesn't make sense to me.

With that said, I'd like recommendations for hiking routes in southern Norway that cross majestic landscapes, fjords, scenic views, forests, lakes, glaciers, etc.

It's important that they aren't overcrowded; I hate mass tourism.

Recommend me hikes of all levels and durations.

My initial planned route will be between Folgefonna National Park and Jostedalsbreen, but I need to know exactly which hiking trails I'll be doing so I have all the information.

Thanks