I'd suggest to stock with 1x betta splendens solo.
What temperature were you planning on setting the tank to? Neons and corys prefer cooler temps ~24C, while blue rams, zebra danios and kuhlis prefer warmer ~28C. I'd suggest a temp. of around 25.5-26C if you were still going with the stock you listed. Don't buy angels if you get the neons.
Oh, and if you want your heater to have a longer life, tilt it to ~45 degrees. Something to do with the heat in the bottom coils traveling vertically straight up into already hot coils above and stressing the load.
You could use some top swimmers too.