What would look nice with a Rudbeckia "Cherokee Sunset" in a 14-inch, golden-yellow ceramic planter?

Surrounding planters are golden yellow and emerald green and contain red and yellow geums and an orange and yellow abutilon (and a pink hibiscus that will look totally clashy and out of place but which I know I won't be able to move until after the summer's over).

Any suggestions?

Thanks in advance,

Heather