Hello Lynn, here are my recommendations:
1.
Corythoichthys schultzi (Pair)
2.
Doryrhamphus multiannulatus (Pair)
3.
Dunckerocampus boylei (Pair)
4.
Discordipinna griessingeri
5.
Flabelligobius sp.
6.
Trimma rubromaculatus 1.5 (1 male. 5 female)
7.
Heteroconger hassi (Group min. 3)
there are still many more one could recommend but this would be my favorites.
edit:
PS. Any
Lobophyllia,
Trachyphyllia or
Cynaria ad color and does not sting the seahorses.