Seems like a waste to me to buy the Bayo games if you've already played them. But if you're any amazing as me, because I own the Xbox 360 release of the first game and both Bayo 1+2 for both Wii U and Switch, maybe you should. These games are always amazing and Bayo 2 benefits from the increased frame rate.
However, it sounds like Monster Hunter is your easy bet, since you struggle to get into JRPGs, and Octopath really is a hit or mis kind of game. I still can't get into it either, honestly, I own it. The stories are nothing that much special, and, as a result, I can hardly care about the setting it tries to get me in. The visuals are is its strongest asset, but they can get tiring, and if you aren't that fond of classic JRPGs, I think it wouldn't have much going on for you.
My bet with The_Liquid_Laser: I think the Switch won't surpass the PS2 as the best selling system of all time. If it does, I'll play a game of a list that The_Liquid_Laser will provide, I will have to play it for 50 hours or complete it, whatever comes first.