No fry are hardy - they are all delicate and require different levels of specialized care depending on species. I would say any species where the fry hitch at birth, such as Erectus, give the hobbyist one less headache to worry about - but they are still not 'easy'.
It takes a lot of time to successfully raise fry. Twice daily siphoning of the fry tank, feeding 3 or 4 times a day, hatching bbs daily and enriching it, etc etc.
Raising fry is a challege - and very rewarding when things go right. Very discouraging when things go wrong.
Tom