Not sure if this counts, but
http://www.mangago.me/read-manga/love_shuttle/
MAN I LOVE YOU YAS
http://www.mangago.me/home/mangalist/389995/
may fucus on some artists?
like "U" (I'll put some links for example, may easier to find if I have a typo with the names)
http://www.mangago.me/read-manga/muka_tsuku_douryou_to_sefure_ni_narimashita/
inoue satou http://www.mangago.me/read-manga/10_dance/
ike reibun http://www.mangago.me/read-manga/bi_no_isu/
scarlet beriko http://www.mangago.me/read-manga/yondaime_ooyamato_tatsuyuki/
nishida higashi http://www.mangago.me/read-manga/ace_no_kyuujitsu/
ikuyasu http://www.mangago.me/read-manga/koitomo_triangle/
Naono Bohra http://www.mangago.me/read-manga/trip_lovers/
here some single ones
http://www.mangago.me/read-manga/t_x_s/
http://www.mangago.me/read-manga/himegoto_asobi/
mhh I would also count yoneda kouo but the uke's (lol) are mixed I would say but very good stories http://www.mangago.me/read-manga/reply/
http://www.mangago.me/read-manga/punch_up/
this one is more diff., the art itself- they do look more slender. this is the prequel. uke here is manly (my opinion) but in the prequel the uke really looks girlish
http://www.mangago.me/read-manga/aka_to_kuro_katsura_komachi/
btw. sorry for the long post
Great, thank you so much!
Are there any yaois where the uke isn't a sweet, shy, naive cutie that acts like a kid? Are there any mangas or manhwas with a mature, thoughtful, smart uke who doesn't act "girly" or young?