Another show we've been watching for a while, and that we've just reached the end of, is "Snowpiercer" - a post-apocalyptic show about a massive train that contains the last remnants of humanity in a frozen world. There are four seasons, the first three of which are on Netflix, and the last is on ITV-X (actually, they're all there now).
Truth is, I almost gave up on "Snowpiercer" in the second episode, when there was almost a scene so horrible I just couldn't continue. Fortunately, they backed off from that one.
But "Snowpiercer" ends up having three great seasons, and then one more season. Season 4 is, unfortunately, rather disjointed and not close to the same standard as the others. But it is an ending, and sometimes that's what matters.
(Incidentally, there's also a movie called "Snowpiercer", which has the same premise but is otherwise significantly different. Both are okay, but I prefer the series.)
Ultimately, I think I recommend watching the first three seasons of this, and then recommend calling it a day - the fourth season just wasn't worth the wait. But then, even knowing what I know now I would have watched that final season, so make of that what you will.
#6: "Nero", by Conn Iggulden