You can do very pretty quilts with large squares (6" or larger) , 2-1/4" sashing (jelly roll) and 2-1/2" cornerstones. Would the 2-1/2" squares for the cornerstones be too small for you to deal with? I just finished a top with fussy cut fairies and Tinkerbell fabric for a little friend who loves green and fairies. Have not taken a picture yet.
I did add piping to the blocks which you certainly would not want to mess with (neither will I again any time soon!) but that was added only because the sashing fabric was too close in color to the background color of one of the fabrics and I just HAD to go on and do piping on all of squares after I had done the green ones....