Tincs are too territorial to be kept in groups, especially the fm's. Leucomelas do well in groups, are active, and have a nice call.
:Tinks as stated in the below are a colorful and bold species.
Auratus are easy to keep but are shy unless the humidity stays high and the tank is well planted. Galactonotus is another good species, but is a bit more expensive.
::i am looking into aquiring a group of frogs for a 55 gallon set up for my den, i was wondering what some of the bolder species are that i could keep in groups and how many i could keep in there, thank you