Up until quite recently, and for a loooooong ass time, Kingdom has been the most consistently rewarding manga out there week to week.
It still is in some ways, if you don't share the view on declining quality.
It's 100% an easy recommendation. It wouldn't have needed it if the greedy cunts behind the animation didn't cheap out. Kingdom will never get a chance to reach its full potential without a proper anime adaptation, but it just doesn't appear to be a priority.