I’d say keep

for sure. Look into
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as well.

and
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seem pretty similar to Smash 4, so I’d keep them as well.
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is also an option, but her kit is worse than Villager’s overall so I’d recommend Villager more.

is in a weird place this time around. He’s still good, but he’s not as dominant w/ all of the overall Ultimate gameplay changes (imo), still a solid choice.

is... a hard one, she’s nowhere near as dominant as in Smash 4. If you’re pretty good w/ managing Luma, she still may be someone to consider keeping.
For
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,
staindgrey
pretty much explains my view on her as well, so just refer back to that post.
Now for a couple more recommendations:
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might be a good fit for you, especially if you’re used to controlling 2 characters like
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.

could also work for you if you’re great at knowing when to play each Pokémon

might also be good for you if you’re good with managing projectiles like
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
. Also has a great recovery.
A bit of a weird one, but I’d also look into
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a bit. Just be ready for a bit of lag on the aerials.
For a sword character,
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is pretty unorthodox, so it’s hard to list another character close to her. I guess if you want a general, balanced swordfighter, look into

.
And now for one biased recommendation:

has decent mobility deals a lot of damage and has some great punish tools, if you use them correctly. He’s a bit high risk, high reward though, so he may/may not fit your style.