That's a tough one... For softies obviously zoanthids but there's a huge assortment. I'd also go with a nice bright green nepthea as they don't drop babies everywhere and seem fairly hardy. Then there's GSP as long as you manage it correctly :-) for SPS pink bird's nest and some of the basic Montis.
Would be easier if we could break it down by three top as SPS, LPS, Etc.