Responses

There are plenty yaoi manga that are unknown with little to no fan base, but are rated quite high from the few that have seen it. I presume that would be okay?
Love Neko must've been popular at one stage, but not many people talk about it anymore.
Hands OFF! was put under the underrated category by people,
Loveholic seems good, but I haven't read it yet.

Here is a list for you!
http://www.mangago.zone/home/mangalist/26620/
any underrated yaoi?? like ones that deserves 4-5stars but they are still unknown to the world