The best art style is the one that fits the comic you're making.
If you use a generic sort of style for the genre you're working in, people will tend to expect the story to stay close to the typical tropes of the genre. So for example, if you see a Romance title and the visual style of it is that very classic Korean webtoons looking style, you'd probably instinctively assume it'll follow the most common tropes of Korean Romance Webtoons. But if you see a Romance and it's drawn in some sort of bold fusion cartoon style, you might expect that it's a bit more unusual, perhaps featuring unconventional characters (maybe an older couple rather than early twenties, or the story is about a couple with geeky interests or perhaps it has heavy comedic aspects).
Beautiful styles are lovely, but if a comic is a comedy, but the art is really pretty, a lot of people won't realise at a glance that it's meant to be a comedy, or even in some cases really pretty art where the characters always look pristine and gorgeous and the panels always have rich depth to them actually damages the comic's ability to be funny.
It's like Heartstopper. When you see Heartstopper, you instinctively feel like it's not going to be a generic shiny BL story because it doesn't look like one. The art has a rough "handmade" sort of charm to it and a more western influenced style, and sure enough, it's about an awkard, down-to-earth love story about lads who play rugby set in a typical British High School.
So I'd advise finding a style you think will appeal to the sort of people who will enjoy the kind of comic you want to make. With my comic I went for a bold, fusion sort of style that might evoke stuff like modern cartoons that combine action with emotional drama, say Young Justice, Avatar/Korra, She-Ra or comics like Witch Boy, Fullmetal Alchemist or Scott Pilgrim, because the people who like stuff like that tend to be the kind of people that like Errant (and also I like those things and made Errant to be like that sort of vibe because I like it!). You can definitely put your own spin on things to some extent, but it is easier to get readers if your style fits in with the kind of stuff your audience is familiar with.