I’ve read both but at different ages. I read the Stand at 16 or 17 and thought it was the grittiest and most suspenseful book I had read at that time. I read Swan Song at 39, and appreciated it but it won’t be as memorable as the Stand for me.
Your list looks like my list, finished both Legion and long way in the past month and agree with recommendations.
also just finished and recommend Embers of War by Gareth Powell