You are so right Tee! I noticed the butterflies would hop on to the yellow flowers first, before going to the other flowers around. Fun to see color preferences with our garden visitors. Yellow for the butterflies and bees, red for the hummingbirds! Oops, sorry, a little off track from the wonderful pot...
Hetty, Aeoniums would look very good on the pot, and maybe surround her with sedum burritos, or the jelly bean sedums or try using also the elephant bush, but let it grow downward, I just do not know the name of the particular kind that trails down, coz mine normally grows upright. I have seen downward growing types from my aunt's garden though.
So excited to see what your final choices would be!!!