[quote=@Inkarnate]
I suppose I should mention that my favorite album of all time is pretty much pop bliss – Pet Sounds. Though I could see arguments for it being a sort of melancholic, introspective happiness rather than one bred from optimism. Brian Wilson wrote it at a point in his career where he was getting experimental musically yet lyrically profound. Tracks such as “Wouldn’t It Be Nice”, “I Know There’s An Answer”, and “You Still Believe In Me” are examples of tracks that embody this spirit per my perspective.

Beyond Brian Wilson and The Beach Boys, I could name a number of albums. Bleed American by Jimmy Eat World, Growing Up is for Trees by I’m from Barcelona, The Law of the Playground by The Boy Least Likely To, Yoshimi Battles the Pink Robots by The Flaming Lips, You’re All I Need by Marvin Gaye & Tammi Terell, Brill Bruisers by The New Pornographers, and You Know Who You Are by Nada Surf are all albums I could recommend from various different styles I enjoy.
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[@Inkarnate] I'll will likely go into your suggestions later, I still haven't finished the last one. (been busy with my roommate trying to get himself killed for the third time in less than a year.) Also his girlfriend basically mentioned/recommended a bunch of British female pop singers because I mentioned I liked that she was listening to Regina Spektor's music. So now I have a dozen more albums on my queue list.

As for the one I am familiar with, I absolutely adore Jimmy Eat World's "Bleed American" album and their music in general. Though I think a good chunk of that album has plenty of sad/emotional moments that don't really make me "feel happy go lucky" maybe if I was sad, it would be heartfelt, so then it could maybe relief that sadness. But Hear You Me, is purely depressing to me. 

"Your House" lyrics. 

You rip my heart right out.

"If you still care at all, don't go, tell me now.
If you love me at all, don't call.
Then out of nowhere, put me right back there.
Rip my heart out, you rip my heart right out."

"Sweetness" lyrics sort of hint, that it's not really a happy song. Seems like a women purposely playing hard to get that he actually wants.

Are you listening?
So tell me what do I need
When words lose their meaning

Won't play your hide and seek game.

Yeah, stumble til you crawl (Whoa,oh,oh,oh,oh,oh)
Sinking into sweet uncertainty

This sweetness will not be concerned with me.

"If you don't, don't" lyrics

I left you waiting, at the least could we be friends?
Should have never started, ain't that the way it always ends?

And I'm sorry that I'm such a mess, I drank all my money could get and,
took everything you let me have and then I never loved you back.

"Get It Faster" 

I don't care what you do.
I'm getting out , no nothing ever shames me.
Don't wanna thing from you
I'm going out, I don't care if you're angry.

I'm holding out, but not getting an answer.
I'm finding out, cheating gets it faster.

"My Sundown"

I could be so much more than this.
No one cares. (Repeated alot.)

Yes, "The middle", is basically one of the best feel good, pop punk songs period. Though I feel like there music and catalog in general has a lot of sad parts. Certainly not saying that's a bad thing. (Love this band.) Though my point was, even the happiest sounding music for most bands, there's almost ALWAYS, plenty of meaningful angst or darkness to go around.

But like I said, will go through the rest of your suggestions. (because any chance I can to listen to some good music, is time well spent.)