Parrot fish are hybrid cichlids so you would really be limited to a medium to large cichlid tank (central and south americans would probably be good choices). You could check into some of the acaras (I've had blues and they were very pretty), severums, keyholes etc. You could also do some larger tankmates like plecos or syndontis catfish for companions. You're probably not going to have any luck with plants because the larger cichlids like to dig. They'll also eat anything that will fit in their mouths so you'll be severely limiting your community/companion fish options.