I dunno about absolute terms, but I have spent a lot of time thinking about which of my excessive-and-poorly-focused character pool I would play against various opponents. So I'll answer the question from that angle, probably in a rambling way.
I play against a slim majority of characters including unknown, but definitely pick (and stay) him against and anyone with a sword.
I prefer against and surely quite a few more. Slow, projectiles, tall; all great things to abuse. For context, I never tried or wanted to get good with Isabelle and have no idea how it has ended up that she is in contention for my best character.
I specifically play into and . I also consider him if it's FD and I think the opponent just doesn't know how to play against rushdown well. If Incineroar fails against someone, I probably have an idea which of the Isabelle/Mac opposite extremes will mess with them more.
I also specifically play against . No idea why it works so much better, maybe it was just the one Mewtwo I explored a lot of matchups with, but it clearly worked better than any other character I played. Ness would likely prove ideal in more matchups, including , if I tested that more.
I like and do well enough with her, but haven't found matchup scenarios where I wouldn't be more effective someone else. It's close; I'm sure if I experimented more, I would find weird specific matchups she works best for me for, like with Mac and Ness.
I am never sure who I prefer against . Fast people who grab a lot and kill vertically are a big Dislike for everyone I play.
I enjoy quite a bit, but am not proficient in them enough to outperform all of my other characters in a matchup. (Like Jiggs, but more obviously due to a lack of general skill/mastery rather than a lack of matchup exploration.) PT in particular is a great character that feels powerful to use, but it feels like everyone knows how to play against PT and I'm late to the party.
I play against a slim majority of characters including unknown, but definitely pick (and stay) him against and anyone with a sword.
I prefer against and surely quite a few more. Slow, projectiles, tall; all great things to abuse. For context, I never tried or wanted to get good with Isabelle and have no idea how it has ended up that she is in contention for my best character.
I specifically play into and . I also consider him if it's FD and I think the opponent just doesn't know how to play against rushdown well. If Incineroar fails against someone, I probably have an idea which of the Isabelle/Mac opposite extremes will mess with them more.
I also specifically play against . No idea why it works so much better, maybe it was just the one Mewtwo I explored a lot of matchups with, but it clearly worked better than any other character I played. Ness would likely prove ideal in more matchups, including , if I tested that more.
I like and do well enough with her, but haven't found matchup scenarios where I wouldn't be more effective someone else. It's close; I'm sure if I experimented more, I would find weird specific matchups she works best for me for, like with Mac and Ness.
I am never sure who I prefer against . Fast people who grab a lot and kill vertically are a big Dislike for everyone I play.
I enjoy quite a bit, but am not proficient in them enough to outperform all of my other characters in a matchup. (Like Jiggs, but more obviously due to a lack of general skill/mastery rather than a lack of matchup exploration.) PT in particular is a great character that feels powerful to use, but it feels like everyone knows how to play against PT and I'm late to the party.