I haven't faced any villagers worth mentioning, but after having seen Ranai obliterate the competition in Japan, I feel that this is a character that is going to be extremely elusive in terms of playstyle, and thus not very easy to have written down on paper, my suggestion is to post pone villager until later.
60:40
Is a strange match up, the fact that WFT covers herself in hitboxes makes it hard to just roll behind and punish her, one can argue that the fact there's a whistle every time she does a smash attack is a handicap as it reveals her move, but at the same time she's good at playing the camping came offstage with the football ledge shenanigans, however Fox is very potent at punishing that with a Dsmash or Dtilt.
Over all she's got her sun salutation which can kill, a somewhat long grab, and a great Nair together with a loot of footsies like Dtilt that hides her hurtbox.
In general she's easy to keep comboing, has end lag on her smash attacks, and doesn't posses a potent killing throw, but Deep Breath will make her attacks deadlier, and she'll likely use that off stage where Fox isn't as potent.
If and when she goes offstage, it's important to reflect and or shield the pokes and punish her for grabbing the ledge without invincibility.
Avoid her jab fisher, as being buried can set you up to a Uair or Smash attack.
55:45
Lucario's neutral early on is weak, but as he gains rage it becomes a real problem with aura, this MU is generally centred about Lucario playing passively when he reaches the 80%s and starts spamming Aura sphere and Force Palm.
The force palm of Lucario can probably KO fox at 90 if he's at 100% himself, I've been Bair'd from the center of the stage at 66 against a 110 something Lucario and even with DI I perished.
This match up is all about the first stock, if he takes the lead he'll camp you out with spheres.
The best option to dealing with Lucario imo is edge guarding him, Sheik is able to just hang from the ledge and spam Bair to continue to deny him the ledge and he's forced to take a risk to recover unto stage directly from Extreme Speed.
Now Fox's Bair isn't the best at edge guarding like Sheiks, but it's doable, if not you can always try to wait for his ledge option and either jab jab Dsmash him when he's to the side of the ledge, or try trumping him and then having him regain the ledge for a Dsmash, or watch him recovery unto the stage and do a running Usmash.
In general, I find that most Lucario's are going to play the rolling and dodging game a lot here, due to Fox not having solid throw killing options means that Lucario will likely shield a lot and roll away, or fake jump and b reverse an Aura sphere or Force Palm.
A good Lucario makes this feel like 40:60 the second he gets rage, so this is a MU I feel we have to play aggressively