frogprince, you wrote:

No wonder I sometimes feel like Charlie Brown, when he was asked "Is there anywhere where you feel out of place", and he said "Yes; earth."
-snip-

Is this Charlie Brown who hangs out with Snoopy. Linus, and Lucy or this one:

Fe-fe, fi-fi, fo-fo, fum
I smell smoke in the auditorium

Charlie Brown, Charlie Brown
He's a clown, that Charlie Brown
He's gonna get caught
Just you wait and see
(Why's everybody always pickin' on me)

That's him on his knees
I know that's him
Yeah, from 7 come 11
Down in the boys' gym

Charlie Brown, Charlie Brown
He's a clown, that Charlie Brown
He's gonna get caught
Just you wait and see
(Why's everybody always pickin' on me)

Who's always writing on the wall
Who's always goofing in the hall
Who's always throwing spit balls
Guess who (who, me) yeah, you

Who walks in the classroom, cool and slow
Who calls the English teacher, Daddy-O

Charlie Brown, Charlie Brown
He's a clown, that Charlie Brown
He's gonna get caught
Just you wait and see
(Why's everybody always pickin' on me)

[Instrumental Interlude]

Who walks in the classroom, cool and slow
Who calls the English teacher, Daddy-O

Charlie Brown, Charlie Brown
He's a clown, that Charlie Brown
He's gonna get caught
Just you wait and see
(Why's everybody always pickin' on me)

Source: http://www.oldielyrics.com/lyrics/the_coasters/charlie_brown.html

-snip-

I wonder what political label would fit either of these [or other]fictitious characters...

As to being between a Virgo and a Scorpio, I'd bet neither one of these were a Libra. At least the Coasters' Charlie Brown sounds more like a Sagittarius or an Aquarian to me.