Let's see...way too many out there, I'll just throw out a couple nice key of G chords
7-x-0-7-x-x
5-x-0-6-x-x
and move that general shape around a lot.
Also, must have chords for percussive rhythm (root note with 3 and octave, and root + b3 and b3 octave)
7-6-x-8-x-x
7-5-x-7-x-x
umm...an interesting Dsus4 for variety
x-5-4-0-3-x
you can also throw in the 2 with the open high e, or fret the high e at the fifth to give it another 5.
The fat sounding e5 on all six strings finally wore out for me, so I'm pretty sick of it. Another variation with only 2 root notes, is
0-2-x-4-0-0
a nice sounding bm(something; don't feel like figuring it out) for key of D is
x-2-0-2-3-0
I think that's quite enough for now, but I could go on forever. Well, a couple more shapes for good measure
x-5-4-6-5-x
5-7-9-6-5-5
x-x-3-5-x-5 (very fun little shape)
Let's hear some original thought in here
EDIT: didn't see Mr. Churchyard beat me to that 2 (or 9) shape.