I saw @gammachris sonic tier list and wanted to make my own. Each tier is sorted so higher rated games in the tier are further to the left. I only included the games I've played enough of for me to meaningfully rank them on a list.
I'll explain any of these that people want explained. I will say up front though that most of my Sonic Unleashed playtime has been on the Series X through backwards compatibility. It runs at 60 fps, even during the werehog missions.