Underrated/Unknown Animes

You've asked the right person! I like to watch underrated animes too! xD

Morita-san wa Mikuchi (although this one is short)
Tantei Opera Milky Holmes (it has a bit of sexual themes 或者 whatever though)
AnoHana (it has gotten fairly known though :)
Hanayamata
Shigofumi
Gosick (haven't watched it but from what i've heard it's pretty good)
Saki: Achiga-hen (the original/other Saki had a bit of Yuri so here's a 更多 grounded one)
Myself;Yourself
Kill me Baby (it's pretty weird,but it's fairly good)
你 and Me
Sora no Woto
Kokoro Connect
Arcana Famiglia (maybe?)
Inari Kon Kon (i recently watched this,it's short too)
hmm...maybe Azumanga Daioh 或者 Little Busters,but personally i think they're pretty well known? i dunno

sket dance and some of the series i would like to mention is mentioned 由 alinah

and even chihayafuru :)

Kino's journey
Ikoku meiro no croisee
tokyo magnitude 8.0
Tsuritama
tegami bachi
gunslinger girl?? (idk is respected but i consider it underrated because no one really talks about it)
earl and fairy

Here's Mine:
1.Medaka Box
2.Katanagatari

I Really 爱情 These Anime's And I Think It's A Shame That Most People Don't Give Them Any Attention !!!!

Alpen Rose
Les Misérables:Shōjo Cosette
Prétear
Magic Knight Rayearth(I wouldn't call it unknown but it is pretty underrated in my opinion,)