How do I create a smooth transition between features across different planes?

Hi there -

This forum has helped me a lot in the past, but this problem is really stumping me. I made a box, but built the features out from the surface of the planes of the box. My issue is that I want to have a perfect corner/smooth transition between these features in order to create a fillet across them. The box edges are drafted, so it makes it difficult. How do I do this? Am I just overthinking this? Thank you!

SolidworksMysolidworks