That's an overstocked tank. It may not look like it now but as those fish grow you're most likely going to run into trouble. If it were mine, I'd remove all the angels. The jack dempseys will probably begin terrorizing them, the severums will be pretty iffy with the angels. I know some people who keep angels with severums with no issues but I know more people who weren't able to keep the two together, myself included. My severum was relentless in attacking other fish.
I'd recommend deciding which you want more, the jack dempseys and severums or the angels. With either of the pairs of fish you might also run into territorial aggression especially if they begin breeding.
What are the dimensions of the tank? Is it a 6' or 4' 150?
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