@mommunism I never really got into Toaru but will definitely avoid it. I mean it's basically harem-like right? And yet they never resolve anything romantically.
Marginally better are works where there's an actual romance or harem, but so often it's also like a "promised" future romance (like 8th Son, where he has multiple fiancees, yet doesn't ever do anything with them). Or the "death attribute magician doesn't want to die a 4th time" where, again, multiple fiancees, but he's literally in a child's body so it'll be years.
Seinen definitely seems like the way to go. for Isekai, there's Mushoku Tensei. Then there's the MC in Parasyte. Baki gets laid, Guts gets laid.
I really don't understand what's so hard about authors letting a few ships sail. They don't have to be H scenes. You can tell which of your friends are in serious relationships without personally seeing them fuck. Even main characters in DBZ grow up, get married, have kids.