Which frogs would be best?

[Mossfarmer]

What kind of dart frog would be best for my 20 gallon vertical vivarium? I am a first-time dart frog keeper and a college student (so no Leucs, Phyllobates or Epidobates, sadly). The vivarium is newly build, so it will still be many months before I even consider adding frogs. I am just looking for some help from more experienced froggers.

Dwarf Tincs
Pros: large, bold, relatively hardy, 10-20 year lifespan, quiet call
Cons: territorial, can only live in male-female pairs, tadpoles and froglets must be raised separately, might struggle to utilize vertical space

I don't have space for multiple vivariums to keep froglets and to separate aggressive frogs, so I am worried about aggressive Tincs are said to be.

Those who keep dwarf tincs like Bakuis, Oyapocks, or French Guiana Dwarfs, what are their personalities like? Do you see them frequently? How well do they climb?

Ranitomeya sp.
Pros: cute, less territorial, can live in groups, parents raise tadpoles, offspring can live with parents once they are large enough
Cons: tiny, shy, louder call, not as hardy, harder to find

Those that keep Ranitomeya sp., do you see your frogs often? If you keep larger groups, how do you make sure all of the frogs are okay without tearing apart the vivarium? Do you ever see any aggressive behavior? How loud is the call?