Here is what I have in my 30 gallon cube and it may seem like allot of fish,
2 Green Chromis
1 flame angel
1 Marine Betta
1 Cinnamon clown
In my 33 gallon sump I have 2 false percula clowns and two saddle back clowns a mandarin fish and a small blue stripe goby. All of these fish are small except for the Betta and flame angel.
I am sorry for your loss, Flame angels are nice fish. This is my second one and I have had this one for two years. I have heard that some of these fish are cyanide caught and come from some great depths in the ocean causing them to live a short life . My first Flame died within two weeks, it had no visible lesions or ich
Hope you find a healthy fish for your setup