Example 1
Umphreys Mcgee
tabbed by viscousflow

Intro
E-----------------
B---5----5-4-----3
G---5----5-4-----3
D---4----4-3-----2
A---5----5-4-----3
E-----------------
   D9   D9 Db9   C9
Listen to the progression with 9th chords
Verse Basic D Dorian
E--10---x------10---
B--10--12------12---
G--10--12------10---
D--10--12------12---
A--12--14------10---
E--10---x------10---
  Dm7   G      G7 can work also (along with other G voicings)
Then a keys solo. Still hanging around D Dorian. 
Pony Bass varies off this:
E-----------------------------------------------
B-----------------------------------------------
G------------------------------------------------
D--10-12--10-12--------------------8-9-9-10-12----
A------------------8-8-9-10--8-10----------------
E---------------10------------------------------
[VERSE 2]

Riff based around this.
E------------------------------------------
B------------------------------------------
G----------9--7------10p9------------------
D-----9h10------9---------10p9----7--10-9--
A--12-------------10-----------10----------
E------------------------------------------
E--17p14---------14-17
B--------15---15------
G-----------14--------
D---------------------
A---------------------
E---------------------
*Groove*
Bass:
E-------------------------------------------------------------
B-------------------------------------------------------------
G-------------------------------------------------------------
D-------------------------------------------------------------
A----------------------4-5-5-5-5-5-5-5-5-5-7------------------
E--5-5-5-5-5-5-5-5-5-5-----------------------3-5-5-5-5-5-5-5-5
E--7--7---------8--8
B--5--5---5-----5--5
G--5--5---5-----5--5
D--5--5---4-----7--7
A--7--7---5-----5--5
E--5--5---------5--5
  Aadd9   D9 or Dm7sus2?
guitar/piano solo in A dorian. 

Then the hook:
E--5----------------(7)-------5
B-(8 )---------------5-------(8 )
G--5-------9p7-------5--------5
D--5--7h10-----10p7--7------5-5
A--7-----------------5--5-7---7
E--5-----------------5--------5
                   ^^Can also play D9 here 

The jazzy nature of this song leaves a lot open for interpretation as far as chord voicings go. Between all the guys in the band there are a ton of different chord tones coming out, so experiment away!