There's a decent amount of artists doing Yukkuri stuff who's art quality is well above what should normally be dedicated to meme balls, which makes me think either well established artists dabble (more like dabbled) into Yukkuris occasionally, or artists got their start on Yukkuri and moved on to more mainstream things as time went on. The other day I found a non-Yukkuri work from big.g (https://exhentai.org/g/1105855/8be46eba30/ NSFW obviously) and I chuckled at how different his normal artstyle is from his Yukkuri one. But it made me think about what former artists out there are doing bigger things.
Kiriraitaa pretty much dropped off the face of the Earth a few years ago Yukkuri wise, but his art was good enough to assume that he didn't just stop drawing altogether. Kiriraitaa, as a name, is itself a Yukkuri reference, so I'm not surprised he wouldn't use it for normal things, though I am surprised big.g is comfortable with using the same name for both. I bet it would be interesting to track down what he does nowadays.