Anemones and corals are such close cousins, your question is very hard to answer as it is currently written. BESIDES corals? It's kind of like asking "is there anything as interesting as an ostrich besides birds?" LOL
If you're asking for something that looks similar to an anemone but is NOT a coral, I don't know how to help you. I can't think of any non-coral that is similar to an anemone. But if you're asking are there any corals that look similar to an anemone and would be appropriate for your tank, then yes there are dozens if not hundreds. Bubble coral looks very much like a bubble-tip anemone, for example.
One coral I find very interesting that is vaguely anemone-looking is called a Duncan. But there are literally hundreds of coral that look similar to an anemone. I don't know that a clown will host to any of them, however.