Ohhhhh, well I will let you in on a few chords that have become the backbone of my rhythm guitar playing in the past few years. They are all played on the bottom 4 strings and can be moved up and down.
Here are the first ones, the Major7 chords. Here are four different inversions of Cmajor7 (bear in mind that you can move each of these to make other major7 chords:

--3-------7--------8--------12-----------------
--1-------5--------8--------12----------------
--4-------5--------9--------12----------------
--2-------5--------9--------10----------------
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Here are 4 inversions of Cminor7:

--4-------6--------8--------11-----------------
--1-------4--------8--------11------------------
--4-------5--------8--------12-----------------
--1-------5--------8--------10-----------------
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I could do the dominant7 ones too but I gotta go, I'll do them later if anyone is interested. It's worth learning all of these movable patterns. some of them are harder to finger than others unfortunately.
I'm considering making a whole lesson just for the learning and application of these great Drop2 voicings, if only I was an instructor....