The ending of 'Inception' is the big hol-up moment. It kind of happy, but we're not getting the answer how real it is.
The ending of 'The Sopranos' is very 'happy-not-happy'. Despite speculations
::: spoiler spoiler
did was Tony killed or not
:::. I mean, he is main character, and still he is a mafia boss, so could there be really good ending?
I also think that the happy ending of the 'E.T.' not happy at all. Even if federal government would be good to them, how would those children live their normal lives after all those events?
The ending of Makoto Shinkai's 'Weathering with you' is kinda happy but for real is definitely not. The main couple is together but the price of it is Tokyo drowned.