Was the clown sick? Do you know why he died? did you have him long? How are the water parameters?
You could get a b/w oscellaris clown.
Yellow headed jawfish are cool.
Bangaii cardinals- but would need to get at least 2.
Chalk bass are nice and add some blue.
orange striped cardinals are pretty
A goby of some kind
That's all I can think of tight this second