How about these two?
https://mangadex.org/title/190/koharu-no-hibi (the "yandere" in this one is somewhat tame 'no physical violence', but I guess that's the best case scenario you can ever have.)
https://mangadex.org/title/31152/zomviguarna (this one is a bit more focused on the action and events rather than the relationship between the MC and yandere, but at least there isn't more than one love interest - the yandere - in it)