So I think a harem maybe checks all the boxes of what i'm looking for but it doesn't have to be a harem it can be a shounen without a harem or a shoujo.

What I'm Looking for:

Necessary-

Completed and fully scanned (or close).
No male love rival, its fine if there is a rival for a couple chapters (kinda like seta from Love Hina gets in makes MC jealous then gets out).
One "main girl". Should be able to tell pretty early who he is going to end up with.
Clear non-harem ending, should end up with the main girl and should not be left open.
Can have drama but the main focus should be on something else like comedy, slice of life ect.

Good examples of what i'm looking for are Love Hina and Nisekoi and i know you could say Nisekoi has two "main girls" but it's still pretty easy to see which one he is going to end up with just by the way it was set up.

Thank you in advance for you suggestions. 🙂

I think the world is still beautiful meets your criteria, however it's not fully complete but close. There's also Colette wa shinu koto no shita

Ai Yori Aoshi is pretty much what you are describing...

~4400 manga completed
~1700 ongoing...

thanks this look good.

@Rosepedal43
They both look pretty good ill add them to my list of thing to read in the future

Surprisingly few harems have satisfying endings. I wonder why? 😉

GE
Kami nomi zo Shiru Sekai keeps you guessing on main heroine until latter half of story
Mayo Chiki!
Ore ga Doutei o Sutetara Shinu Ken ni Tsuite less harem-y
Rosario to Vampire and sequel

I haven't finished reading these ones myself, but I'm guessing they end well (by their rating):
Nozoki Ana
Nana to Kaoru
Yamada-kun to 7-nin no Majo
Gokukoku no Brynhildr