There’s nothing wrong with having more than one style (repeating it to myself every day as a mantra, because I really struggle with that myself - despite all evidence that it´s not a problem) and which ones to focus on really depend on many factors. What project is it? What is catching people’s attention? Which pieces/style generate leads and which don’t?
That said, there are a few things that catch my eye that I throw in for your consideration. I`ve seen lots of your art in the past years on the forum and all of it is very polished and very professional, and you clearly have lots of skills. Your drawing skills are amazing and this is probably something to capitalize on: when you give more emphasis to the linework (like in your inked pieces and basically all work here except the first two) I feel the work is more impactful and more „alive“.
There is one aspect that I would think about: the way you do faces feels a little too formulaic. What I mean is that you have a shorthand for faces (which is good for speed, for sure), but they end up all looking the same, regardless of age, situation or character. I feel this could be a limitation potentially, especially given that you define character so well with other elements: physique, clothing and props. I think experimenting with different ways to express character through the facial features could elevate your work regardless of style.
Another aspect to consider is what at school they called „appeal“. We had lots of discussion about that, in many different courses. It has nothing to do with cuteness or even with a character being good or bad, and there are no concrete definitions of it...it´s more a „you know it when you see it“ kind of thing. So I know it sounds vague and undefined when I say that is something to think about. It affects characters particularly, but also any animal or object that can be thought of as a character. I guess you sense it when you say your character end up „evil-looking“. I think the word is „less appealing“. Maybe a way to say it more concretely is that there are elements in your drawings like teeth singled out, tongues sticking out, extreme positions of hands etc... that make it more difficult for the viewer to „stick“ with your image and feel a sense of identification with your characters. Maybe an artist to look into is Scottie Young, particularly his „I hate fairyland“ series, which features a thoroughly evil and unhinged but very appealing character.
So, after all this rambling, my personal draw is to the crow on the sword and the howling dog. Those pieces sticks out for me as the most appealing of all and the most suitable to children’s books. Whatever you decide to do in terms of style, maybe it´s worth exploring that one with human characters, environments etc, and see where it takes you?