suitable reef safe fish for a 20 gallon

[inspire]

Hi, i just setup my 20 gallon and i was wondering what fish i can have that will be suitable to put in after my tank is cycled. I am planning to keep corals so reef safe fish are a must. I know that i cant have many fish beacuse i only have a 20 gallon, but what do you guys suggest as good reef safe fishes?
I am thinking of maybe a pair of clowns and a blenny. What fish besides these are good for a 20 gallon tank but still provide lots of color and are reef safe?