We have a list of artists who are OK with scat, based on likes from pixiv and tumblr:
andr01d-art, blackless-b, ictiosis, kikirism, lewdliquidn, mastr7up, msvondran, strikeafterdark, zaxsworld

There is also a list of western artists who have done scat artwork, but most of their drawings are lost or only in patreon:
ber00, goophilia, kerikeri-san, lollipopcorn, muffinfetish/tentacle-muffins, pcengine/vatrus, supersatanson, xxoom