Not a manga but still good. https://m.webtoons.com/en/comedy/boyfriend-of-the-dead/list?title_no=1102
https://www.webtoons.com/en/fantasy/hooves-of-death/list?title_no=1535
https://www.webtoons.com/en/sf/rebirth/list?title_no=1412
https://www.webtoons.com/en/challenge/zomcom/list?title_no=70195
https://tapas.io/series/ZombieWife
I'll comeback with more once I remember other titles ^^
Recommend me some good zombie manga
Edit: zombie Yaoi wasn't what I had in mind, but I'll take it (=・ω・=)