Watch the Fareed's Trade Secret #13 online guitar lesson by Fareed Haque from Jazz Comping Survival Guide
In a few examples I throw in some things we have not covered. One thing I do that you can try is playing guide tone plus 2 extensions starting on the A string. This creates a rich darker sound often associated with Jim Hall chord voicings. (block diagram) Take this a step further and try adding guide tones plus 3 extensions. Now that guide tones are on lower strings you can add one more extension. Listen to Ted Green, Ed Bickert and Lenny Breau. They all do this!