Serialized media that doesn't suffer from "the ending problem"?

I would define this problem as a very common issue in the modern world of serialized writing projects. A project has incredible potential, and the writing throughout seems to be unparalleled...

And then the showrunners/creators drop the most disappointing ending known to man. Examples of this include GoT, You, Sherlock, Stranger Things, and many, many manga and anime (Demon Slayer, Chainsaw Man, My Hero Academia, Usagi Drop, etc.)

This can be for any number of reasons. A lack of pre-planning. Too many really cool but confusing threads because the author wanted their work to sell. A desire to move on to other projects.

It can happen slowly with gradually declining writing quality, such that fans see this coming from a mile away, or it can happen so fast and unexpectedly that it comes as a shock to all (wtf, they just ended it like that???)

Right now I can only think of a few projects that buck this trend:

1. The Sopranos

2. Breaking Bad

3. The Wire

4. Full Metal Alchemist (manga and FMAB)

Can anyone think of any other serialized media that doesn't suffer from "the ending problem"?