Minor chords at the open neck
(I'll write all the available notes, and you can pick the ones you want in order to suit your voicings/grips) L means lower, R means raise. I use a D for my first string.
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Am7 Em7 Ebm Bm Cm7 Gm
1------0--------------------0---
2--0---0------------------------
3--0---0(L)-------0(7--0--------
4--0--------0(R)--0(7--0(R--0(R-
5--0---0----0(5)--0(5--0----0---
6--0---0----0(6)-------0(6------
7--0-------------------0--------
8--0----------------------------
9-------------------------------
10---------------------0--------
Half diminished chords at the open neck:
Am7b5 F#m7b5 Cm7b5 Bm7b5 Ebm7b5
1---------------------0--------0----
2---------------------0(8-----------
3--0-----0------0-----0(L-----------
4--0-----0------0(R---0--------0----
5--0-----0(5----0(5------------0(5--
6--0(6---0------0(6------------0(6--
7--0-----0------0-------------------
8--0--------------------------------
9--------0(5------------------------
10----------------------------------
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You also asked about the "flat five" chord...
that's a loaded question, but in my opinion, most "flat five" chords are in actuality #11 chords. There are two types, those which are dominant (contain the flattened seventh) and those which are not dominant (contain the natural seventh).(e.g. Sam Rivers' "Beatrice") I think it's fair to say the dominant variety is more common (Take the A Train, Laura, At night in Tunisia, etc.)
7#11 chords at the open neck
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F7#11 D7#11
1-------------0---
2-----------------
3--0(L--0(7---0---
4--0----0(7---0(L-
5--0----0-----0(5-
6--0(6--0(6---0---
7--0----0-----0---
8--0----0-----0---
9--0----0-----0---
10------------0(5-
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The last voicing uses a half-tone lower on your fourth string, which not everyone has.
I hope that's helpful. There are probably more, if I think about it a bit.
-John
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