Anything ORA is going to be decently easy.
Most people start with Monti, Birdsnest and Poci, but those end up being pests to some. To me:
Poci = Clove Polyps of SPS... when going well, will spawn and take over your tank
Birdsnest = Green Button Polyps... cool when they are not encroaching on other stuff that you like better
Monits = Mushrooms... most of them get old after a while, but there are some REALLY cool ones that you might want to keep around as long as you keep them separated from everything else.
For acros that you might want to keep long-term, ORA Ant Insigns is great, Tyree Ultimate Stag (any stag really) and TriColor Valida are great places to start. ...maybe a Red Dragon if your parameters are solid.
I would avoid any Millepora, Tables, Lokani, Loripes, Granulosa and other deepwaters until your tank is really stable.