well, the only thing i can think of is to find something that will balance it. i'd say, repeat something like the triangles, but instead of making it a stripe or solid, put an applique look to it... perhaps something that has a large size near the whiter corner and goes to smaller... i was thinking flying geese, but those are already in a round. maybe a couple of birds on a branch nearer the corner and extending the branch toward the stripe-y corner. [better you than me]. i have faith that you will find the right thing as you are so talented.