angelfish compatible with Severums, Nicaraguensis

I have added 3 angelfish about 4" to a 125g tank (lots of driftwood and rocks)which contains 1 5" Gold severum, 2 4" Green Severums a pair of nicaraguensis about 4"and a very small firemouth. There are also 6 congo tetras and 3 killifish as well as 3 clown loaches. The fish are doing real well together now. I am prepared to move the firemouth when he grows if it becomes aggressive. Do angelfish do well with severums? Nicaraguensis? The severums and nicaraguensis are the show fish and I do not want to move them. Does this sound like a workable setup? They look great together now.