I don't believe these have ever been translated. Thought I should mention them since they caught my eye, and seem to be slightly better quality. May be wrong, though.

-[Aji Ponntarou] Honto wa Eroi!? Nihon no Mukashi Banashi (4) - Should be on e-hentai
-[Aji Pontarou] Nyotaika Inkou Housei (comic KURIBERON Vol.17) [Chinese] - Chinese version on e-hentai
-Seitenkan Collection - The japanese raws were posted on hitomi.la, Pages 75-96, 153-172, 173-188.
-Kyuuai Utopia - The japanese raws can be found on nhentai Pages 6-31, chapter 1-2. I believe this fell into GB category.
-Nyotaika! Monogatari 3 - A copy can be found on Hitomi.la- Pages 130-145 [Not a personal favorite overall, but I saw the opening images posted here and there, so it seems to be slightly popular]

Others I noticed:

-Comic Mate L. Vol 12, Pages 140-155 [Would greatly appreciate a summary if anyone can read this] - Found on Hitomi.la

-COMIC Mate Legend Vol.11 2016-09, Pages 178-199 [Mixed feels on this one. Opening seems to be good, but not a fan of the later half.] - Found on Hitomi.la