There are. However, given that Kamitani is the owner of Vanillaware, purchasing anything made by them will support their artists. For the most part their art is their defining feature, more so than their games (not to say that their games are bad, but they're not for everyone, and many of them, despite being belt-scroller type games, never reach the level of being, say,
Streets of Rage 2).
I have always felt uncertain about Kamitani's designs. They typically border on the ridiculous, so it's hard to know if they're intended to be taken seriously or not. Women and men are often both targets of looking ridiculous, so at the very least, it can be said that Kamitani's art is even in its prejudice, even if it is prejudiced (which might be said of Hyung-Tae Kim's art as well, despite many women genuinely enjoying his art style -
http://cuteinkorea.com/hyung-tae-kim-interview/ ) . Art can often be sexist, in fact there are entire realms of art criticism which determine most male artists to be sexist. And honestly, they probably are in part. That's not necessarily their fault though, it's just part of being raised in a society ruled by patriarchal views about acceptable content. That said, it doesn't mean that they can't change for the better.
The only problem I really see with Kamitani's art, aside from it being a sort of weird pornography, was his response to Schreier, which was far more problematic than the art itself. Yes, it wasn't a very adult way to respond to criticism, but I think it's also fair to say that he didn't give much of a chance for Kamitani to speak either, so there is blame on both sides of the aisle.
By comparison, Urushihara's art is really problematic, and probably one of the most obvious modern offenders with regards to sexism. At least, far more so than Kamitani or other videogame artists.