Earthbound / mother 2 is also 5 stars for me and can definitely be played before hand. There is overlap in the antagonist and references but otherwise mother 3 takes place an incomprehensible amount of time in the future. I didn’t include earthbound since its a tiny bit more backtracky and explory but tbh it’s about as linear as m&l superstar saga so I’d def recommend it if you want to play!