Don't know the two you mention, so I cannot comment with your taste in mind.
In terms of "playing a role", King of Dragon Pass is the absolute champion on iOS: you are the chief of a Celtic-inspired tribe and need to lead them to survival and eventually form a clan. Interface is more like a strategy game. All your actions have consequences. If you're open for a different experience, go for it.
Other than that, you have quite the selection by now, depending on what you prefer, e.g.:
Baldur's Gate 1&2
The Spiderweb games (Avadon, Avernum series)
Gamebooks (lots of them)
Chaos Rings series