My go to pattern - especial for batiks - is Syncopated Rhythm by Karen Montgomery. It uses 10" squares grouped by color and a non regular pentagon (sides are different lengths) and then cut as you would a Buggy Barn. While she no longer has the pattern on her website - I recently wrote her and she sold me some for a class I did at guild.
Here are three I did from the same pattern - first two are batiks - the other is made from 30's prints.
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