I think almost everyone in here has played at least one mainline Mario game before, as it is one of the biggest selling points of the Nintendo consoles in the first place. However, with some many games being out, there will naturally be some disagreements on which game is better than the others.
Here are my rankings:
You can make yours here: https://tiermaker.com/create/mainline-mario-games-6439
Here are my rankings:
You can make yours here: https://tiermaker.com/create/mainline-mario-games-6439