To be clear, Musou games are the (Dynasty) Warriors games of which, there are many cross over spin offs like Gundam, One Piece, Zelda, and even Fire Emblem in the near future.
I remember enjoying DW 2 & 3 back in the early ots but it has been a good decade and a half since I've played a Warriors game,
I've thought about picking up one of the One Piece games, having seen them super cheap but never ended up doing it 'cause I've only seen the 1st season and wouldn't really call myself a fan of the series.
I actually wanted to check out the first Dragon Quest Heroes but never pulled the trigger and apparently, they're not considered a Musou game?
I think I could see myself playing a Final Fantasy branded one. I wouldn't buy it full price but definitely would get it when it was cheaper. A lot of characters to choose, it's got guns, it's got blades, it's got gunblades, magic, and summons and all that. I'd be up for the fan service.
I'm sure someone's gonna say The Warriors branded Warriors game.