BL storylines are actually more like: meet, fuck, love ┑( ̄Д  ̄)┍
there is this one i like a lot
http://www.mangago.zone/read-manga/soredemo_yasashii_koi_o_suru/
and others mangas of yoneda kou
but i think you already have read his work
Try to take a look at my favorite BL List… I actually feel the same way as you, so most of my favorites are on the plotside or have something else that really captivated me. Maybe there are some that you haven't read yet… http://www.mangago.zone/home/mangalist/40317/ good luck! (︶︿︶)=凸
This! The art borders on bara but the plot is pure yaoi feels. Relationship that starts out as just sex but builds into something beautiful. Have tissues handy, though, because it will break your heart into little pieces and then put it back together.
http://www.mangago.zone/read-manga/senya_ichiya_shitone_no_himegoto/
(I know I've recommended this like four times in the last week but I love it so much. I feel like an evangelist. For yaoi. A yaoivangelist.)
You're looking for manga that aren't amongst the 1,500 you've read so far, AND have all these other quality controls laid on them. From your list, I'm not surprised you have trouble finding manga to your liking. I doubt more than 200 exist that would adequately fulfill such requirements, and such manga are bound to be on nearly everyone's favourites lists. So that would be the first place to try.
Setting that aside, you may have luck if you try CONman's list of infrequently read manga:
http://www.mangago.zone/home/mangalist/38390/
Be forewarned, however: there is usually a good reason why manga are not frequently read.
Hey guys !! I'm really bored lately and when i want to read a BL but there is always somthing that's not right (an author that always does the same cara design, rape because "i can't stand it anymore" when they just met, stories with artificial feelings and storyline in three words [meet, "love", fuck])
(╯°Д °)╯╧╧ Yeah I know i'm difficult but I know BL is not all about that !! Do you have a BL with an original storyline and/or strong feeling and/or really sweet and/or an important message ? or just simply the best that you know (=・ω・=). I read a lot of BL (+1500) so it's kind of hard to find an unknown and good one.
Ps: sorry dear reader for the long message
A desperate fujoshi veteran