Have to list mine, as each has a special place in the garden, the absolute best are highlighted. I am genuinely happy wherever I see any of them.  They are all easy care, or "show" you early when they need water.  

Ground covers - ajuga, native violet 

Water garden - lilies, cannas

Trees - Jacaranda

Shrub - Pittosporum, Vibernum, Loropetalum (plum + white)

Potted - Mandevilla,  Begonia (cathedral + billbergia)

Climber - Star Jasmine, Hardenbergia

Bedding - Salvias, verbena, petunias, yellow marigolds

Bulbs - jonquils, ranunculas.

DEB