I think everyone is equal in this poly..
http://www.mangago.zone/read-manga/canis/ (Second story, it starts at chapter 19 but I would recommend just starting from chapter 1)
fluff
http://www.mangago.zone/read-manga/suzutsuki_neko_wa_nyao_to_naku/
http://www.mangago.zone/read-manga/fuyushirazu_no_koi/
http://www.mangago.zone/read-manga/oh_my_assistant/
http://www.mangago.zone/read-manga/yamada_to_shounen/
http://www.mangago.zone/read-manga/katakoi_opera/
http://www.mangago.zone/read-manga/shoushin_otoko_ni_haru_no_arashi/
http://www.mangago.zone/read-manga/senpai_danjite_koidewa/
http://www.mangago.zone/read-manga/salad_days_tang_liuzang/
http://www.mangago.zone/read-manga/negative_kun_to_positive_kun/.
Any healthy Yaoi poly relationships? Like where they communicate and don’t fight over each other?