I adore Shiwasu no Okina, and I'm also a big fan of some of the "usuals": Homunculus, Kisaragi Gunma (though his stuff gets bland after awhile), Naruco Hanaharu, NaPaTa, Yukimi and Yamatogawa. But I won't post any of their stuff (except
Chupachari because hot damn), since I like too many to pick and choose.
A few specific favorites from other artists:
The
Fela Pure series. I try to stay away from incest tags 'cause it's not really my thing, but Fue does fellatio scenes exceptionally well. It's rough and dirty and pretty awesome if you're also an oral fan.
The Neighborhood Couple K&S: this one is recent but it's so adorable. It hits home for me as well so I really love it.
Private Lesson: A really good female teacher/male student one.
Setsunateki Mousou Shoujo - Lion Heart Chapter: From a pretty long series where the main character has sex with a lot of guys, with a similar formula over and over again...but this chapter was really hot.
Going Otome Ch.6: It's hilarious. Ignoring the copious amount of virgin blood Takenoko is fond of, it's pretty hot as well.
The March Rabbits of An After School Chapter 2: I think the sex is just really well done. Also the teacher is adorable.
I'll end it with
Riko's Big Adventure because all hail pettanko that isn't associated with a loli character! /speaks levels to me
I have more in my Favorites but I chose the ones that stand out to me/ones I've revisited.