Should be ok, personally i would sex the fh first and go with opposite sex parrot. Some fh wont mix after being alone but most of all of mine do well with other fish, i have a female kamfa and male fh x carpentis ( pearl or texas) paired off together in a large cichlid community tank and they dont bother anyone as long as the other fish stay outta there small piece of real estate. All fh are different in my expierience if you add a smaller fh to a tank with bigger fish then they dont get aggressive, but also the fh could remain dark in color, all depends on the fish.
This is the male fh x the female a red texas male and a zonatus, all nasty fish but the all get along, it may not last forever but they have all been together since 1" and range in size 7"+++
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There are other fish in the tank as well, more than these two pics
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