I don't mean this to be a plug but if you listen to my
newest song the plucked chords in it are very comlicated, there are actually 3 synths playing diffrent parts of the chord that I bring in and out as the song progresses and the last part they all play together. When I make a chord pattern I usually start with a simple chord, 3 notes maybe, and copy that for 4 bars. I then experiment with changing the chord in diffrent parts of that pharse until I have something that sounds good and progressive. Then I take that loop and double it and change the last one up a bit to keep the that same sense of progression. Once I have something that is 16 bars in length I use that as the main chords and usually copy and paste that through the track.
I find that a lot of my success with chords is complete luck through much experimentation, the same I can program a synth for a few hours on end (I love doing this) I can there and make huge chords through 1 or 2 hours of work.
I hope this helps.