If you are looking into, say maroon clownfish or certain others you may want to add them last to your tank, as some are known to be aggressive and territorial. Read up on the ones you like and see which ones you think would go best.
I think you could have some cute clean up crew members, like maybe a couple diamond goby or watchman goby, peppermint or banded cleaner shrimp, brittle or serpent star(s), snails, hermit crabs, feather dusters....
You have the ideal tank for any type of tank that you dream of. Take a little time and really take a good look at all the options that you have!! Good Luck and HAVE FUN!!