The flame would be fine.
The six bar would only work for a short time. A 55 is definately too small to keep the fish for long. They grow up to a foot and a half.
is only 2" and in the 55 gal but will be moved to a 250 gal in july will the six and a flame be ok together in the same tank??????? my lfs says that they will not due to the fact that they are both angels... but in a large tank i thought they would be fine
IME dwarf angels and large angels will not fight with each other. If they were added at the same time, I don't see any reason why it wouldn't work.
If one is already established you may need to watch for aggression, but I think it should work.