All Series with a harem-seeking male lead that’s a polygamy. No dense mc. Thanks!

There's a tag that's literally called "Harem-Seeking Male Lead" in the advanced search.

Here's the link: https://www.mangaupdates.com/series?category=Harem-Seeking+Male+Lead

I'm a jack of all trades but master of none. Too many jars and not enough hands.

Re:Monster is a fairly decent one.

Quote from LazyReviewer

There's a tag that's literally called "Harem-Seeking Male Lead" in the advanced search.

Here's the link: https://www.mangaupdates.com/series?category=Harem-Seeking+Male+Lead

This list has a LOT of hentai titles

Quote from SOSAnimeBoy

Re:Monster is a fairly decent one.

Quote from LazyReviewer

There's a tag that's literally called "Harem-Seeking Male Lead" in the advanced search.

Here's the link: https://www.mangaupdates.com/series?category=Harem-Seeking+Male+Lead

This list has a LOT of hentai titles

That's just an unfortunate side effect of this site tracking lots of different published works. Hentai wasn't even on my mind—I just copied the link from the tag dictionary without even looking at the page it lead to—and I just wanted to make it easy for the OP to find "all" the works with that tag.

Use the advanced search to filter out hentai if you want (the checkbox section). I'd also suggest removing "adult", "mature", and "smut". Sadly, just about everything falls under "ecchi" nowadays so that one would probably have to stay unchecked.

Here's a revised link to make it easier (though I request everyone use the advanced search instead of making a thread for it): https://www.mangaupdates.com/series?category=Harem-Seeking+Male+Lead&perpage=50&exclude_genre=Adult_Mature_Smut_Hentai_Shounen+Ai_Shoujo+Ai_Yaoi_Yuri

I'm a jack of all trades but master of none. Too many jars and not enough hands.