I hear you. I have found that few things are as impressive to me as a very large anemone, such as a Ritteri/Magnifica or a LTA, with long flowing tentacles and a big column/foot with color. But the downside is that these creatures would really need their own tank, or a significant portion of a large tank, so as not to harm their neighboring corals, which can look somewhat unnatural to us although in the wild I'm sure its perfectly natural.
You could try putting some monti caps near the base of the rock column the ritteri is sitting on. Monti caps don't require a large amount of intense light and they are quite a bit more hardy that acroporas and may tolerate the overshadowing and ocassional touch from the anemone. This would fill in that space under the anemone rather quickly and give that area a more 'natural' look.
I've had a rose BTA grow out of the middle of one of my large green monti caps once, and although the immediate area of the cap bleached, the outlying areas of the cap not touch directly by the tentacles, remained perfectly healthy and colorful. It was quite beautiful. Unfortunately, the rose decided to move to a different location a few months later. The cap continues to do well.