I want you guys to post your favorite non popular Beatles song. And you can also post there solo albums as well.

This one is from Ringo's newest album, and it's featuring Paul McCartney, I love it.

This one is Dear Boy, from Pauls Solo career with Wings.

Beatles = God.

Phew. There are dozens I'm sure. But for now I'm going to post Birthday, a song that I think is often too overlooked on the white album.

I don't know much about what is popular and what isn't, but I love 'I Want You (She's So Heavy)'.

We Can Work it Out

Not necessarily the best, but some I think are really good and people often don't know or never heard of

Glass Onion
Happiness is a Warm Gun
I Me Mine
Things We Said Today
Good Morning, Good Morning
Octopus's Garden
And Your Bird Can Sing
Got to Get You Into My Life
I'm Only Sleeping
Drive My Car
She's Leaving Home

What you posted aren't even Beatles songs!

Anyhow, I think Hello Good bye is fairly underrated. 

none, because beatles are entirely overrated.

If by underrated you mean "luckily no one knows it because it sucks"...

Funnily, that's the first Beatles song I heard, we had to transcribe the lyrics in my english class, in elementary school

Well if everybody thinks it sucks then that's definitely underrated.