Can you share some more about your set up and your goals?
It's easy to suggest beginner corals, but a lot of the easy ones can be problematic later if your shooting for more difficult corals in the long run.
Ie; mushrooms, GSP's, and button polyps are all easy and super hardy, but all can be a problem if your shooting for SPS in the future.
You'd get more accurate answers if you posted some tank specs. Size, amount of rock, skimmer etc.
Xenia, yellow polyps, most zoas, soft corals and mushrooms should do fine.